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Finding the Fourth Proportional to 87,998.60, 131,706.30 and 81,000.20

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Solution

The fourth proportional to 87,998.60, 131,706.30 and 81,000.20 is: 121,231.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,998.60 : 131,706.30 = 81,000.20 : x
  2. Step 2: Convert to fraction form
    87,998.60/131,706.30 = 81,000.20/x
  3. Step 3: Cross multiply
    87,998.60x = 131,706.30 × 81,000.20
  4. Step 4: Simplify right side
    87,998.60x = 10,668,236,641.26
  5. Step 5: Solve for x
    x = 10,668,236,641.26/87,998.60
  6. Step 6: Final answer
    x = 121,231.89

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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.