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Finding the Fourth Proportional to 137.97, 207.68 and 118.18

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Solution

The fourth proportional to 137.97, 207.68 and 118.18 is: 177.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.97 : 207.68 = 118.18 : x
  2. Step 2: Convert to fraction form
    137.97/207.68 = 118.18/x
  3. Step 3: Cross multiply
    137.97x = 207.68 × 118.18
  4. Step 4: Simplify right side
    137.97x = 24,542.79
  5. Step 5: Solve for x
    x = 24,542.79/137.97
  6. Step 6: Final answer
    x = 177.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.