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Finding the Fourth Proportional to 138,391.62, 207,649.26 and 67,275.24

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Solution

The fourth proportional to 138,391.62, 207,649.26 and 67,275.24 is: 100,942.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,391.62 : 207,649.26 = 67,275.24 : x
  2. Step 2: Convert to fraction form
    138,391.62/207,649.26 = 67,275.24/x
  3. Step 3: Cross multiply
    138,391.62x = 207,649.26 × 67,275.24
  4. Step 4: Simplify right side
    138,391.62x = 13,969,653,802.32
  5. Step 5: Solve for x
    x = 13,969,653,802.32/138,391.62
  6. Step 6: Final answer
    x = 100,942.92

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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.