The bulky left-hander swiped 74 off just 58 balls with 11 boundaries as New Zealand posted a challenging 315 for seven at the Wanderers.
He did it in considerable discomfort after pulling a groin muscle early in his innings, an injury which has ruled him out of the remainder of the eight-nation tournament.
Ryder's post-match celebrations were further muted when he was fined 15 per cent of his match fee after being found guilty of breaching the International Cricket Council's (ICC) code of conduct for breaking his bat over a chair following his dismissal in the 20th over.
After walking from off the field Ryder struck and broke a chair with his bat as he approached the dressing room.
"This sort of behaviour is entirely inappropriate for any player," ICC match referee Javagal Srinath said.
"It is understandable that Jesse felt disappointment following his dismissal, especially given the fact that he had sustained an injury during his innings and knew he would probably be out of action for a considerable time as a result.
"But he must maintain a certain level of self-control and clearly Jesse's actions went beyond what would be deemed acceptable."
Ryder pleaded guilty to the offence and apologised at the hearing.
Later, captain Daniel Vettori said Ryder had aggravated an old injury.
"He's had it for a long time, this injury. It repaired itself but he did it all over again today.
"It's very sad for him and I don't think it is a good prognosis."
New Zealand have asked to bring in Aaron Redmond, a top-order batsman who can bowl legspin, to replace Ryder for the remainder of the tournament.
