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Finding the Fourth Proportional to 138.38, 191.04 and 132.60

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Solution

The fourth proportional to 138.38, 191.04 and 132.60 is: 183.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.38 : 191.04 = 132.60 : x
  2. Step 2: Convert to fraction form
    138.38/191.04 = 132.60/x
  3. Step 3: Cross multiply
    138.38x = 191.04 × 132.60
  4. Step 4: Simplify right side
    138.38x = 25,331.90
  5. Step 5: Solve for x
    x = 25,331.90/138.38
  6. Step 6: Final answer
    x = 183.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.