The third proportional to 81 and 27 is:
Answer & explanation
Correct answer: option 4
81 : 27 : x
⇒ The third proportional x,
⇒ 81x = 27 x 27
⇒ 81x = 729
⇒ x = 9.
The third proportional to 81 and 27 is:
Correct answer: option 4
81 : 27 : x
⇒ The third proportional x,
⇒ 81x = 27 x 27
⇒ 81x = 729
⇒ x = 9.