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Finding the Third Proportional to 57.66 and 87.47

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Solution

The third proportional to 57.66 and 87.47 is: 132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.66 : 87.47 = 87.47 : x
  2. Step 2: Convert to fraction form
    57.66/87.47 = 87.47/x
  3. Step 3: Cross multiply
    57.66x = 87.47 × 87.47
  4. Step 4: Simplify right side
    57.66x = 7,650.78
  5. Step 5: Solve for x
    x = 7,650.78/57.66
  6. Step 6: Final answer
    x = 132.70

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.