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Finding the Fourth Proportional to 138,760.60, 208,079.34 and 63,862.60

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Solution

The fourth proportional to 138,760.60, 208,079.34 and 63,862.60 is: 95,765.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,760.60 : 208,079.34 = 63,862.60 : x
  2. Step 2: Convert to fraction form
    138,760.60/208,079.34 = 63,862.60/x
  3. Step 3: Cross multiply
    138,760.60x = 208,079.34 × 63,862.60
  4. Step 4: Simplify right side
    138,760.60x = 13,288,487,658.68
  5. Step 5: Solve for x
    x = 13,288,487,658.68/138,760.60
  6. Step 6: Final answer
    x = 95,765.57

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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.