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Finding the Fourth Proportional to 87,331.60, 130,920.60 and 52,285.20

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Solution

The fourth proportional to 87,331.60, 130,920.60 and 52,285.20 is: 78,381.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,331.60 : 130,920.60 = 52,285.20 : x
  2. Step 2: Convert to fraction form
    87,331.60/130,920.60 = 52,285.20/x
  3. Step 3: Cross multiply
    87,331.60x = 130,920.60 × 52,285.20
  4. Step 4: Simplify right side
    87,331.60x = 6,845,209,755.12
  5. Step 5: Solve for x
    x = 6,845,209,755.12/87,331.60
  6. Step 6: Final answer
    x = 78,381.82

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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.