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Finding the Fourth Proportional to 425,575.76, 638,456.99 and 126,079.74

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Solution

The fourth proportional to 425,575.76, 638,456.99 and 126,079.74 is: 189,147.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,575.76 : 638,456.99 = 126,079.74 : x
  2. Step 2: Convert to fraction form
    425,575.76/638,456.99 = 126,079.74/x
  3. Step 3: Cross multiply
    425,575.76x = 638,456.99 × 126,079.74
  4. Step 4: Simplify right side
    425,575.76x = 80,496,491,615.58
  5. Step 5: Solve for x
    x = 80,496,491,615.58/425,575.76
  6. Step 6: Final answer
    x = 189,147.27

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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.