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Finding the Fourth Proportional to 138.44, 191.07 and 94.74

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Solution

The fourth proportional to 138.44, 191.07 and 94.74 is: 130.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.44 : 191.07 = 94.74 : x
  2. Step 2: Convert to fraction form
    138.44/191.07 = 94.74/x
  3. Step 3: Cross multiply
    138.44x = 191.07 × 94.74
  4. Step 4: Simplify right side
    138.44x = 18,101.97
  5. Step 5: Solve for x
    x = 18,101.97/138.44
  6. Step 6: Final answer
    x = 130.76

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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.