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Finding the Fourth Proportional to 87,924.80, 131,887.20 and 54,747.20

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Solution

The fourth proportional to 87,924.80, 131,887.20 and 54,747.20 is: 82,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,924.80 : 131,887.20 = 54,747.20 : x
  2. Step 2: Convert to fraction form
    87,924.80/131,887.20 = 54,747.20/x
  3. Step 3: Cross multiply
    87,924.80x = 131,887.20 × 54,747.20
  4. Step 4: Simplify right side
    87,924.80x = 7,220,454,915.84
  5. Step 5: Solve for x
    x = 7,220,454,915.84/87,924.80
  6. Step 6: Final answer
    x = 82,120.80

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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.