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Finding the Fourth Proportional to 67.39, 92.88 and 54.97

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Solution

The fourth proportional to 67.39, 92.88 and 54.97 is: 75.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.39 : 92.88 = 54.97 : x
  2. Step 2: Convert to fraction form
    67.39/92.88 = 54.97/x
  3. Step 3: Cross multiply
    67.39x = 92.88 × 54.97
  4. Step 4: Simplify right side
    67.39x = 5,105.38
  5. Step 5: Solve for x
    x = 5,105.38/67.39
  6. Step 6: Final answer
    x = 75.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.