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Finding the Fourth Proportional to 94.01, 140.20 and 80.38

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Solution

The fourth proportional to 94.01, 140.20 and 80.38 is: 119.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.01 : 140.20 = 80.38 : x
  2. Step 2: Convert to fraction form
    94.01/140.20 = 80.38/x
  3. Step 3: Cross multiply
    94.01x = 140.20 × 80.38
  4. Step 4: Simplify right side
    94.01x = 11,269.28
  5. Step 5: Solve for x
    x = 11,269.28/94.01
  6. Step 6: Final answer
    x = 119.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.