What is the third proportional to 4a²b and 8ab²?

Correct Answer: 16b³

Subject: Mathematics

• 8ab²
• 8a³b
• 16b³
• 16a²b

Explanation: Let the third proportional be x. According to the question, 4a²b : 8ab² :: 8ab² : x ⇒ 4a²b / 8ab² = 8ab² / x ⇒ x = 64a²b⁴ / 4a²b = 16b³.

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