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Finding the Third Proportional to 67 and 111.75

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Solution

The third proportional to 67 and 111.75 is: 186.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67 : 111.75 = 111.75 : x
  2. Step 2: Convert to fraction form
    67/111.75 = 111.75/x
  3. Step 3: Cross multiply
    67x = 111.75 × 111.75
  4. Step 4: Simplify right side
    67x = 12,488.06
  5. Step 5: Solve for x
    x = 12,488.06/67
  6. Step 6: Final answer
    x = 186.39

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.