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Finding the Fourth Proportional to 87,335.20, 131,002.80 and 31,952.80

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Solution

The fourth proportional to 87,335.20, 131,002.80 and 31,952.80 is: 47,929.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,335.20 : 131,002.80 = 31,952.80 : x
  2. Step 2: Convert to fraction form
    87,335.20/131,002.80 = 31,952.80/x
  3. Step 3: Cross multiply
    87,335.20x = 131,002.80 × 31,952.80
  4. Step 4: Simplify right side
    87,335.20x = 4,185,906,267.84
  5. Step 5: Solve for x
    x = 4,185,906,267.84/87,335.20
  6. Step 6: Final answer
    x = 47,929.20

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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.