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Finding the Fourth Proportional to 87,335.40, 131,003.10 and 80,920.20

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Solution

The fourth proportional to 87,335.40, 131,003.10 and 80,920.20 is: 121,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,335.40 : 131,003.10 = 80,920.20 : x
  2. Step 2: Convert to fraction form
    87,335.40/131,003.10 = 80,920.20/x
  3. Step 3: Cross multiply
    87,335.40x = 131,003.10 × 80,920.20
  4. Step 4: Simplify right side
    87,335.40x = 10,600,797,052.62
  5. Step 5: Solve for x
    x = 10,600,797,052.62/87,335.40
  6. Step 6: Final answer
    x = 121,380.30

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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.