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Finding the Third Proportional to 67 and 107.69

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Solution

The third proportional to 67 and 107.69 is: 173.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    67 : 107.69 = 107.69 : x
  2. Step 2: Convert to fraction form
    67/107.69 = 107.69/x
  3. Step 3: Cross multiply
    67x = 107.69 × 107.69
  4. Step 4: Simplify right side
    67x = 11,596.60
  5. Step 5: Solve for x
    x = 11,596.60/67
  6. Step 6: Final answer
    x = 173.08

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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.