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Finding the Fourth Proportional to 138,761.60, 191,491.61 and 78,332.96

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Solution

The fourth proportional to 138,761.60, 191,491.61 and 78,332.96 is: 108,099.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,761.60 : 191,491.61 = 78,332.96 : x
  2. Step 2: Convert to fraction form
    138,761.60/191,491.61 = 78,332.96/x
  3. Step 3: Cross multiply
    138,761.60x = 191,491.61 × 78,332.96
  4. Step 4: Simplify right side
    138,761.60x = 15,000,104,713.53
  5. Step 5: Solve for x
    x = 15,000,104,713.53/138,761.60
  6. Step 6: Final answer
    x = 108,099.83

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