Home / 87,517.60-131,434.80-76,631.20

Finding the Fourth Proportional to 87,517.60, 131,434.80 and 76,631.20

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Solution

The fourth proportional to 87,517.60, 131,434.80 and 76,631.20 is: 115,085.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,517.60 : 131,434.80 = 76,631.20 : x
  2. Step 2: Convert to fraction form
    87,517.60/131,434.80 = 76,631.20/x
  3. Step 3: Cross multiply
    87,517.60x = 131,434.80 × 76,631.20
  4. Step 4: Simplify right side
    87,517.60x = 10,072,006,445.76
  5. Step 5: Solve for x
    x = 10,072,006,445.76/87,517.60
  6. Step 6: Final answer
    x = 115,085.50

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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.