Find the third proportional to 16 and 36.

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KPTCL Assistant Exam (Mescom) SLOT-2 2017 click here to view all questions

Find the third proportional to 16 and 36.

A121

B81

C72

D144

rahul ? Jan 20 '2020 at 19:44

Correct answer is: 81

Explanation:

If C is the third proportional to A and B, then \(\frac{A}{B} = \frac{B}{C}\)

If x is the third proportional to 16 and 36, then \(\frac{16}{36} = \frac{36}{x}\)

\(=> \frac{4}{9} = \frac{36}{x}\)

\(=> x = 36 \times \frac{9}{4}\)

\(=> x = 9 \times 9\)

\(=> x = 81\)

Hence, The third proportional to 16 and 36 is 81.

All DiscussionsClick here to write answer

Correct answer is: 81 Explanation: If C is the third proportional to A and B, then \(\frac{A}{B} = \frac{B}{C}\) If x is the third proportional to 16 and 36, then \(\frac{16}{36} = \frac{36}{x}\) \(=> \frac{4}{9} = \frac{36}{x}\) \(=> x = 36 \times \frac{9}{4}\) \(=> x = 9 \times 9\) \(=> x = 81\) Hence, The third proportional to 16 and 36 is 81. rahul ? answered Jan 20 '2020 at 19:44 All Comments

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