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Finding the Fourth Proportional to 94.91, 142.19 and 79.52

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Solution

The fourth proportional to 94.91, 142.19 and 79.52 is: 119.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.91 : 142.19 = 79.52 : x
  2. Step 2: Convert to fraction form
    94.91/142.19 = 79.52/x
  3. Step 3: Cross multiply
    94.91x = 142.19 × 79.52
  4. Step 4: Simplify right side
    94.91x = 11,306.44
  5. Step 5: Solve for x
    x = 11,306.44/94.91
  6. Step 6: Final answer
    x = 119.12

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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.