Steve Smith made 105, but retired Australian skipper Aaron Finch managed just 5 in the final day of international competition as the home side went 267-5 against New Zealand in Cairns. .
Australia have already won the three-match Chappell-Hadley Series after winning the first game by two wickets before thrashing the Black Caps by 113 runs in the second game.
New Zealand captain Kane Williamson won the toss to send Australia in, and after a brief silence to mark the death of Queen Elizabeth II, Finch strode to the crease in the 146th ODI, I was given an honorary guard by Black Cap.
He endured one loud lbw yell, but it didn’t last long and was bowled by Tim Southey when he attempted a drive from the 13th ball he faced and went off to a standing ovation.
It ended a career in which he scored 5,406 runs at 38.89, reaching the 17th century and leaving only Ricky Ponting (29), David Warner and Mark Waugh (both 18) in the Australian pecking order.
The 35-year-old Finch announced his intention to exit the 50-over format on Saturday after feeling unwell, but will remain in charge of the Twenty20 side at home next month’s World Cup.
His longtime opening partner Warner rested after Josh Inglis handed the chance and was caught 10 by Trent Vault, unable to grab.
Faced with 22 dot balls, Australia left 16-2 as nervous Smith and Marnus Labouchagne struggled to stay calm.
However, they persevered and forged an important partnership of 118 runs.
Smith brought up a half-century at 4, and Loveshagne scored his fifth 50, then missed a pull shot soon after to be out for 52 and was caught by James Niesham off the vault.
Unexpectedly, the stunning Smith powered the 12th ODI century off 127 balls, hitting ten 4s and 6s before being bowled by Mitchell Santner.
Alex Carey added a calm 42, Cameron Green added a quickfire 25 and Glenn Maxwell 14. Vault was the bowler’s pick at 2-25.
