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Finding the Fourth Proportional to 94.17, 140.49 and 91.24

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Solution

The fourth proportional to 94.17, 140.49 and 91.24 is: 136.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.17 : 140.49 = 91.24 : x
  2. Step 2: Convert to fraction form
    94.17/140.49 = 91.24/x
  3. Step 3: Cross multiply
    94.17x = 140.49 × 91.24
  4. Step 4: Simplify right side
    94.17x = 12,817.96
  5. Step 5: Solve for x
    x = 12,817.96/94.17
  6. Step 6: Final answer
    x = 136.11

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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.