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Finding the Third Proportional to 67.13 and 86.81

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Solution

The third proportional to 67.13 and 86.81 is: 112.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.13 : 86.81 = 86.81 : x
  2. Step 2: Convert to fraction form
    67.13/86.81 = 86.81/x
  3. Step 3: Cross multiply
    67.13x = 86.81 × 86.81
  4. Step 4: Simplify right side
    67.13x = 7,536.41
  5. Step 5: Solve for x
    x = 7,536.41/67.13
  6. Step 6: Final answer
    x = 112.27

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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.