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Finding the Fourth Proportional to 204.41, 281.96 and 129.69

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Solution

The fourth proportional to 204.41, 281.96 and 129.69 is: 178.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.41 : 281.96 = 129.69 : x
  2. Step 2: Convert to fraction form
    204.41/281.96 = 129.69/x
  3. Step 3: Cross multiply
    204.41x = 281.96 × 129.69
  4. Step 4: Simplify right side
    204.41x = 36,566.74
  5. Step 5: Solve for x
    x = 36,566.74/204.41
  6. Step 6: Final answer
    x = 178.89

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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.