The Trail Blazers (45-33) sit sixth in the Western Conference four games clear of Houston with four games remaining, and hold the advantage in the tie-breaker.
"It (the playoffs) was one of our goals, so that's good," Portland forward LaMarcus Aldridge said After learning Golden State had beaten Houston 104-101.
"But we have to keep building, keep finding our rhythm to move forward."
Portland and the Warriors were locked at 47-all at halftime, but the home side faded badly in the third quarter, allowing 37 points while scoring just 21.
"Tonight was bad," Portland coach Nate McMillan said. "This is one of those games where you burn the tape and move on."
(Reporting by Mike Mouat in Windsor, Ontario. Editing by Alastair Himmer. To query or comment on this story email firstname.lastname@example.org)