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Finding the Third Proportional to 133.13 and 171.56

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Solution

The third proportional to 133.13 and 171.56 is: 221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.13 : 171.56 = 171.56 : x
  2. Step 2: Convert to fraction form
    133.13/171.56 = 171.56/x
  3. Step 3: Cross multiply
    133.13x = 171.56 × 171.56
  4. Step 4: Simplify right side
    133.13x = 29,433.69
  5. Step 5: Solve for x
    x = 29,433.69/133.13
  6. Step 6: Final answer
    x = 221.10

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.