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Finding the Fourth Proportional to 115.92, 173.88 and 67.79

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Solution

The fourth proportional to 115.92, 173.88 and 67.79 is: 101.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.92 : 173.88 = 67.79 : x
  2. Step 2: Convert to fraction form
    115.92/173.88 = 67.79/x
  3. Step 3: Cross multiply
    115.92x = 173.88 × 67.79
  4. Step 4: Simplify right side
    115.92x = 11,786.99
  5. Step 5: Solve for x
    x = 11,786.99/115.92
  6. Step 6: Final answer
    x = 101.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.