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Finding the Fourth Proportional to 132.71, 199.13 and 74.90

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Solution

The fourth proportional to 132.71, 199.13 and 74.90 is: 112.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.71 : 199.13 = 74.90 : x
  2. Step 2: Convert to fraction form
    132.71/199.13 = 74.90/x
  3. Step 3: Cross multiply
    132.71x = 199.13 × 74.90
  4. Step 4: Simplify right side
    132.71x = 14,914.84
  5. Step 5: Solve for x
    x = 14,914.84/132.71
  6. Step 6: Final answer
    x = 112.39

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