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Finding the Third Proportional to 87.33 and 122.13

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Solution

The third proportional to 87.33 and 122.13 is: 170.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.33 : 122.13 = 122.13 : x
  2. Step 2: Convert to fraction form
    87.33/122.13 = 122.13/x
  3. Step 3: Cross multiply
    87.33x = 122.13 × 122.13
  4. Step 4: Simplify right side
    87.33x = 14,916.42
  5. Step 5: Solve for x
    x = 14,916.42/87.33
  6. Step 6: Final answer
    x = 170.81

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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.