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Finding the Fourth Proportional to 72.27, 108.41 and 67.92

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Solution

The fourth proportional to 72.27, 108.41 and 67.92 is: 101.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.27 : 108.41 = 67.92 : x
  2. Step 2: Convert to fraction form
    72.27/108.41 = 67.92/x
  3. Step 3: Cross multiply
    72.27x = 108.41 × 67.92
  4. Step 4: Simplify right side
    72.27x = 7,362.87
  5. Step 5: Solve for x
    x = 7,362.87/72.27
  6. Step 6: Final answer
    x = 101.88

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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.