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Finding the Fourth Proportional to 87,672.60, 131,508.90 and 28,510.20

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Solution

The fourth proportional to 87,672.60, 131,508.90 and 28,510.20 is: 42,765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,672.60 : 131,508.90 = 28,510.20 : x
  2. Step 2: Convert to fraction form
    87,672.60/131,508.90 = 28,510.20/x
  3. Step 3: Cross multiply
    87,672.60x = 131,508.90 × 28,510.20
  4. Step 4: Simplify right side
    87,672.60x = 3,749,345,040.78
  5. Step 5: Solve for x
    x = 3,749,345,040.78/87,672.60
  6. Step 6: Final answer
    x = 42,765.30

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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.