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Finding the Fourth Proportional to 139.27, 191.10 and 136.84

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Solution

The fourth proportional to 139.27, 191.10 and 136.84 is: 187.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.27 : 191.10 = 136.84 : x
  2. Step 2: Convert to fraction form
    139.27/191.10 = 136.84/x
  3. Step 3: Cross multiply
    139.27x = 191.10 × 136.84
  4. Step 4: Simplify right side
    139.27x = 26,149.56
  5. Step 5: Solve for x
    x = 26,149.56/139.27
  6. Step 6: Final answer
    x = 187.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.