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      Question

      Find the fourth proportion of (3k), (4k), and (6k). (Note:

      'k' is the smallest two-digit prime number.)
      A 85 Correct Answer Incorrect Answer
      B 86 Correct Answer Incorrect Answer
      C 87 Correct Answer Incorrect Answer
      D 88 Correct Answer Incorrect Answer

      Solution

      k = 11
      3k = 33
      4k = 44
      6k = 66
      33 : 44 :: 66 : m
      33m = 44 ร— 66 = 2904
      m = 2904 รท 33 = 88

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