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Finding the Fourth Proportional to 91.01, 136.24 and 67.97

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Solution

The fourth proportional to 91.01, 136.24 and 67.97 is: 101.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.01 : 136.24 = 67.97 : x
  2. Step 2: Convert to fraction form
    91.01/136.24 = 67.97/x
  3. Step 3: Cross multiply
    91.01x = 136.24 × 67.97
  4. Step 4: Simplify right side
    91.01x = 9,260.23
  5. Step 5: Solve for x
    x = 9,260.23/91.01
  6. Step 6: Final answer
    x = 101.76

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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.