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Finding the Fourth Proportional to 138,520.08, 207,649.44 and 67,397.76

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Solution

The fourth proportional to 138,520.08, 207,649.44 and 67,397.76 is: 101,033.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,520.08 : 207,649.44 = 67,397.76 : x
  2. Step 2: Convert to fraction form
    138,520.08/207,649.44 = 67,397.76/x
  3. Step 3: Cross multiply
    138,520.08x = 207,649.44 × 67,397.76
  4. Step 4: Simplify right side
    138,520.08x = 13,995,107,121.25
  5. Step 5: Solve for x
    x = 13,995,107,121.25/138,520.08
  6. Step 6: Final answer
    x = 101,033.06

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1.5x scale

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.