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Finding the Third Proportional to 81.13 and 151.75

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Solution

The third proportional to 81.13 and 151.75 is: 283.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.13 : 151.75 = 151.75 : x
  2. Step 2: Convert to fraction form
    81.13/151.75 = 151.75/x
  3. Step 3: Cross multiply
    81.13x = 151.75 × 151.75
  4. Step 4: Simplify right side
    81.13x = 23,028.06
  5. Step 5: Solve for x
    x = 23,028.06/81.13
  6. Step 6: Final answer
    x = 283.86

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Why These Related Problems?

These problems maintain the same ratio (1.87) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.