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Finding the Third Proportional to 138.11 and 176.55

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Solution

The third proportional to 138.11 and 176.55 is: 225.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.11 : 176.55 = 176.55 : x
  2. Step 2: Convert to fraction form
    138.11/176.55 = 176.55/x
  3. Step 3: Cross multiply
    138.11x = 176.55 × 176.55
  4. Step 4: Simplify right side
    138.11x = 31,171.56
  5. Step 5: Solve for x
    x = 31,171.56/138.11
  6. Step 6: Final answer
    x = 225.70

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.