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Finding the Fourth Proportional to 178.96, 247.29 and 143.92

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Solution

The fourth proportional to 178.96, 247.29 and 143.92 is: 198.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.96 : 247.29 = 143.92 : x
  2. Step 2: Convert to fraction form
    178.96/247.29 = 143.92/x
  3. Step 3: Cross multiply
    178.96x = 247.29 × 143.92
  4. Step 4: Simplify right side
    178.96x = 35,589.98
  5. Step 5: Solve for x
    x = 35,589.98/178.96
  6. Step 6: Final answer
    x = 198.87

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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.