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Finding the Fourth Proportional to 138,486.48, 207,646.59 and 63,512.70

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Solution

The fourth proportional to 138,486.48, 207,646.59 and 63,512.70 is: 95,230.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,486.48 : 207,646.59 = 63,512.70 : x
  2. Step 2: Convert to fraction form
    138,486.48/207,646.59 = 63,512.70/x
  3. Step 3: Cross multiply
    138,486.48x = 207,646.59 × 63,512.70
  4. Step 4: Simplify right side
    138,486.48x = 13,188,195,576.69
  5. Step 5: Solve for x
    x = 13,188,195,576.69/138,486.48
  6. Step 6: Final answer
    x = 95,230.92

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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.