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Finding the Fourth Proportional to 131.85, 196.92 and 112.39

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Solution

The fourth proportional to 131.85, 196.92 and 112.39 is: 167.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.85 : 196.92 = 112.39 : x
  2. Step 2: Convert to fraction form
    131.85/196.92 = 112.39/x
  3. Step 3: Cross multiply
    131.85x = 196.92 × 112.39
  4. Step 4: Simplify right side
    131.85x = 22,131.35
  5. Step 5: Solve for x
    x = 22,131.35/131.85
  6. Step 6: Final answer
    x = 167.85

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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.