Find the third proportional to 4 and 16?
Options:
(A) 80
(B) 12
(C) 64
(D) 78
(E) 72 OK. Let's think. Some random thoughts first:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Formula = Third proportional = (b × b)/a
A = 4 and B = 16
(16 × 16)/ 4 = 256/4 = 64 The answer: (C).