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Finding the Fourth Proportional to 87,499.20, 131,248.80 and 43,132.80

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Solution

The fourth proportional to 87,499.20, 131,248.80 and 43,132.80 is: 64,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,499.20 : 131,248.80 = 43,132.80 : x
  2. Step 2: Convert to fraction form
    87,499.20/131,248.80 = 43,132.80/x
  3. Step 3: Cross multiply
    87,499.20x = 131,248.80 × 43,132.80
  4. Step 4: Simplify right side
    87,499.20x = 5,661,128,240.64
  5. Step 5: Solve for x
    x = 5,661,128,240.64/87,499.20
  6. Step 6: Final answer
    x = 64,699.20

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1.5x scale

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.