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Finding the Fourth Proportional to 87,388.71, 120,593.10 and 53,385.31

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Solution

The fourth proportional to 87,388.71, 120,593.10 and 53,385.31 is: 73,669.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,388.71 : 120,593.10 = 53,385.31 : x
  2. Step 2: Convert to fraction form
    87,388.71/120,593.10 = 53,385.31/x
  3. Step 3: Cross multiply
    87,388.71x = 120,593.10 × 53,385.31
  4. Step 4: Simplify right side
    87,388.71x = 6,437,900,027.36
  5. Step 5: Solve for x
    x = 6,437,900,027.36/87,388.71
  6. Step 6: Final answer
    x = 73,669.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.