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Finding the Fourth Proportional to 138,472.55, 207,625.78 and 63,498.78

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Solution

The fourth proportional to 138,472.55, 207,625.78 and 63,498.78 is: 95,210.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,472.55 : 207,625.78 = 63,498.78 : x
  2. Step 2: Convert to fraction form
    138,472.55/207,625.78 = 63,498.78/x
  3. Step 3: Cross multiply
    138,472.55x = 207,625.78 × 63,498.78
  4. Step 4: Simplify right side
    138,472.55x = 13,183,983,726.55
  5. Step 5: Solve for x
    x = 13,183,983,726.55/138,472.55
  6. Step 6: Final answer
    x = 95,210.09

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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.