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Finding the Fourth Proportional to 92.92, 139.65 and 67.28

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Solution

The fourth proportional to 92.92, 139.65 and 67.28 is: 101.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.92 : 139.65 = 67.28 : x
  2. Step 2: Convert to fraction form
    92.92/139.65 = 67.28/x
  3. Step 3: Cross multiply
    92.92x = 139.65 × 67.28
  4. Step 4: Simplify right side
    92.92x = 9,395.68
  5. Step 5: Solve for x
    x = 9,395.68/92.92
  6. Step 6: Final answer
    x = 101.11

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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.