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Finding the Fourth Proportional to 87,613.60, 131,614.80 and 85,280.80

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Solution

The fourth proportional to 87,613.60, 131,614.80 and 85,280.80 is: 128,110.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,613.60 : 131,614.80 = 85,280.80 : x
  2. Step 2: Convert to fraction form
    87,613.60/131,614.80 = 85,280.80/x
  3. Step 3: Cross multiply
    87,613.60x = 131,614.80 × 85,280.80
  4. Step 4: Simplify right side
    87,613.60x = 11,224,215,435.84
  5. Step 5: Solve for x
    x = 11,224,215,435.84/87,613.60
  6. Step 6: Final answer
    x = 128,110.42

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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.