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Finding the Fourth Proportional to 178.44, 246.20 and 108.54

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Solution

The fourth proportional to 178.44, 246.20 and 108.54 is: 149.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.44 : 246.20 = 108.54 : x
  2. Step 2: Convert to fraction form
    178.44/246.20 = 108.54/x
  3. Step 3: Cross multiply
    178.44x = 246.20 × 108.54
  4. Step 4: Simplify right side
    178.44x = 26,722.55
  5. Step 5: Solve for x
    x = 26,722.55/178.44
  6. Step 6: Final answer
    x = 149.76

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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.