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Finding the Fourth Proportional to 87,581.60, 131,469.60 and 54,339.20

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Solution

The fourth proportional to 87,581.60, 131,469.60 and 54,339.20 is: 81,569.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,581.60 : 131,469.60 = 54,339.20 : x
  2. Step 2: Convert to fraction form
    87,581.60/131,469.60 = 54,339.20/x
  3. Step 3: Cross multiply
    87,581.60x = 131,469.60 × 54,339.20
  4. Step 4: Simplify right side
    87,581.60x = 7,143,952,888.32
  5. Step 5: Solve for x
    x = 7,143,952,888.32/87,581.60
  6. Step 6: Final answer
    x = 81,569.11

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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.