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Finding the Fourth Proportional to 87,507.76, 131,331.71 and 45,399.91

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Solution

The fourth proportional to 87,507.76, 131,331.71 and 45,399.91 is: 68,136.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,507.76 : 131,331.71 = 45,399.91 : x
  2. Step 2: Convert to fraction form
    87,507.76/131,331.71 = 45,399.91/x
  3. Step 3: Cross multiply
    87,507.76x = 131,331.71 × 45,399.91
  4. Step 4: Simplify right side
    87,507.76x = 5,962,447,587.15
  5. Step 5: Solve for x
    x = 5,962,447,587.15/87,507.76
  6. Step 6: Final answer
    x = 68,136.22

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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.