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Finding the Fourth Proportional to 87,954.80, 131,737.80 and 72,402.80

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Solution

The fourth proportional to 87,954.80, 131,737.80 and 72,402.80 is: 108,444.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,954.80 : 131,737.80 = 72,402.80 : x
  2. Step 2: Convert to fraction form
    87,954.80/131,737.80 = 72,402.80/x
  3. Step 3: Cross multiply
    87,954.80x = 131,737.80 × 72,402.80
  4. Step 4: Simplify right side
    87,954.80x = 9,538,185,585.84
  5. Step 5: Solve for x
    x = 9,538,185,585.84/87,954.80
  6. Step 6: Final answer
    x = 108,444.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.