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Finding the Fourth Proportional to 139.96, 193.17 and 107.11

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Solution

The fourth proportional to 139.96, 193.17 and 107.11 is: 147.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.96 : 193.17 = 107.11 : x
  2. Step 2: Convert to fraction form
    139.96/193.17 = 107.11/x
  3. Step 3: Cross multiply
    139.96x = 193.17 × 107.11
  4. Step 4: Simplify right side
    139.96x = 20,690.44
  5. Step 5: Solve for x
    x = 20,690.44/139.96
  6. Step 6: Final answer
    x = 147.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.