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Finding the Fourth Proportional to 185.52, 255.96 and 138.96

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Solution

The fourth proportional to 185.52, 255.96 and 138.96 is: 191.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.52 : 255.96 = 138.96 : x
  2. Step 2: Convert to fraction form
    185.52/255.96 = 138.96/x
  3. Step 3: Cross multiply
    185.52x = 255.96 × 138.96
  4. Step 4: Simplify right side
    185.52x = 35,568.20
  5. Step 5: Solve for x
    x = 35,568.20/185.52
  6. Step 6: Final answer
    x = 191.72

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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.