Home / 87,517.40-131,276.10-81,296.60

Finding the Fourth Proportional to 87,517.40, 131,276.10 and 81,296.60

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Solution

The fourth proportional to 87,517.40, 131,276.10 and 81,296.60 is: 121,944.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,517.40 : 131,276.10 = 81,296.60 : x
  2. Step 2: Convert to fraction form
    87,517.40/131,276.10 = 81,296.60/x
  3. Step 3: Cross multiply
    87,517.40x = 131,276.10 × 81,296.60
  4. Step 4: Simplify right side
    87,517.40x = 10,672,300,591.26
  5. Step 5: Solve for x
    x = 10,672,300,591.26/87,517.40
  6. Step 6: Final answer
    x = 121,944.90

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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.