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Finding the Fourth Proportional to 431,625.70, 647,487.15 and 132,103.90

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Solution

The fourth proportional to 431,625.70, 647,487.15 and 132,103.90 is: 198,170.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,625.70 : 647,487.15 = 132,103.90 : x
  2. Step 2: Convert to fraction form
    431,625.70/647,487.15 = 132,103.90/x
  3. Step 3: Cross multiply
    431,625.70x = 647,487.15 × 132,103.90
  4. Step 4: Simplify right side
    431,625.70x = 85,535,577,714.89
  5. Step 5: Solve for x
    x = 85,535,577,714.89/431,625.70
  6. Step 6: Final answer
    x = 198,170.72

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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.