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Finding the Fourth Proportional to 174.96, 261.72 and 138.96

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Solution

The fourth proportional to 174.96, 261.72 and 138.96 is: 207.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.96 : 261.72 = 138.96 : x
  2. Step 2: Convert to fraction form
    174.96/261.72 = 138.96/x
  3. Step 3: Cross multiply
    174.96x = 261.72 × 138.96
  4. Step 4: Simplify right side
    174.96x = 36,368.61
  5. Step 5: Solve for x
    x = 36,368.61/174.96
  6. Step 6: Final answer
    x = 207.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.