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Finding the Third Proportional to 54 and 87.13

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Solution

The third proportional to 54 and 87.13 is: 140.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    54 : 87.13 = 87.13 : x
  2. Step 2: Convert to fraction form
    54/87.13 = 87.13/x
  3. Step 3: Cross multiply
    54x = 87.13 × 87.13
  4. Step 4: Simplify right side
    54x = 7,590.77
  5. Step 5: Solve for x
    x = 7,590.77/54
  6. Step 6: Final answer
    x = 140.57

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.