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Finding the Fourth Proportional to 138,601.26, 207,725.13 and 67,540.86

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Solution

The fourth proportional to 138,601.26, 207,725.13 and 67,540.86 is: 101,225.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,601.26 : 207,725.13 = 67,540.86 : x
  2. Step 2: Convert to fraction form
    138,601.26/207,725.13 = 67,540.86/x
  3. Step 3: Cross multiply
    138,601.26x = 207,725.13 × 67,540.86
  4. Step 4: Simplify right side
    138,601.26x = 14,029,933,923.81
  5. Step 5: Solve for x
    x = 14,029,933,923.81/138,601.26
  6. Step 6: Final answer
    x = 101,225.15

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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.