Rearrange the parts of the sentence in correct order.
The question
P-are on the right path
Q-is whether we
R-to the goal

Let's logical connect the fragments starting with the main clause "The question":
"The question" needs a verb to continue the main clause. Segment Q provides "is whether we".

"we" (subject) needs a predicate verb. Segment P provides "are on the right path".

Segment R ("to the goal") acts as a prepositional phrase modifying "the right path".

Combining them: "The question is whether we are on the right path to the goal."
Sequence: QPR