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Finding the Fourth Proportional to 67.71, 92.91 and 60.81

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Solution

The fourth proportional to 67.71, 92.91 and 60.81 is: 83.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.71 : 92.91 = 60.81 : x
  2. Step 2: Convert to fraction form
    67.71/92.91 = 60.81/x
  3. Step 3: Cross multiply
    67.71x = 92.91 × 60.81
  4. Step 4: Simplify right side
    67.71x = 5,649.86
  5. Step 5: Solve for x
    x = 5,649.86/67.71
  6. Step 6: Final answer
    x = 83.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.