The game in Nelson was decided under the Duckworth-Lewis method after wet weather set in with the West Indies apparently heading for their second consecutive heavy defeat.
A timely return to form for opener Martin Guptill, who made 81, saw New Zealand make 285-6 in their 50 overs and the West Indies were 134-5 after 33.4 overs when the rain sent the players from the field.
New Zealand, who won the Test series 2-0, now lead the ODI series 2-1 with one match to play in Hamilton next Wednesday.
Guptill opened with a determination to occupy the crease as long as possible after struggling against the West Indies in his two previous innings with scores of two and one.
He crawled to eight off 40 deliveries before cracking his first boundary when he drove a full-length Dwayne Bravo delivery back over the bowler's head and beyond the sightscreen.
From there, man-of-the-match Guptill never looked back as he batted at nearly a run a ball for the remainder of his innings, which included four fours and two sixes.
Jesse Ryder, fresh from cracking the world's sixth-fastest ODI century in New Zealand's rollicking 159-run victory in the third one dayer on Wednesday, survived two scares to score the bulk of the early runs.


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