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Finding the Third Proportional to 122.44 and 171.38

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Solution

The third proportional to 122.44 and 171.38 is: 239.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.44 : 171.38 = 171.38 : x
  2. Step 2: Convert to fraction form
    122.44/171.38 = 171.38/x
  3. Step 3: Cross multiply
    122.44x = 171.38 × 171.38
  4. Step 4: Simplify right side
    122.44x = 29,369.39
  5. Step 5: Solve for x
    x = 29,369.39/122.44
  6. Step 6: Final answer
    x = 239.87

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.