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Finding the Fourth Proportional to 87,689.80, 131,534.70 and 25,366.60

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Solution

The fourth proportional to 87,689.80, 131,534.70 and 25,366.60 is: 38,049.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.80 : 131,534.70 = 25,366.60 : x
  2. Step 2: Convert to fraction form
    87,689.80/131,534.70 = 25,366.60/x
  3. Step 3: Cross multiply
    87,689.80x = 131,534.70 × 25,366.60
  4. Step 4: Simplify right side
    87,689.80x = 3,336,588,121.02
  5. Step 5: Solve for x
    x = 3,336,588,121.02/87,689.80
  6. Step 6: Final answer
    x = 38,049.90

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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.