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Finding the Fourth Proportional to 87,404.60, 131,139.30 and 84,164.60

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Solution

The fourth proportional to 87,404.60, 131,139.30 and 84,164.60 is: 126,278.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,404.60 : 131,139.30 = 84,164.60 : x
  2. Step 2: Convert to fraction form
    87,404.60/131,139.30 = 84,164.60/x
  3. Step 3: Cross multiply
    87,404.60x = 131,139.30 × 84,164.60
  4. Step 4: Simplify right side
    87,404.60x = 11,037,286,728.78
  5. Step 5: Solve for x
    x = 11,037,286,728.78/87,404.60
  6. Step 6: Final answer
    x = 126,278.10

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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.