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Finding the Fourth Proportional to 138,602.76, 207,727.38 and 67,542.36

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Solution

The fourth proportional to 138,602.76, 207,727.38 and 67,542.36 is: 101,227.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,602.76 : 207,727.38 = 67,542.36 : x
  2. Step 2: Convert to fraction form
    138,602.76/207,727.38 = 67,542.36/x
  3. Step 3: Cross multiply
    138,602.76x = 207,727.38 × 67,542.36
  4. Step 4: Simplify right side
    138,602.76x = 14,030,397,481.82
  5. Step 5: Solve for x
    x = 14,030,397,481.82/138,602.76
  6. Step 6: Final answer
    x = 101,227.40

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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.