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Finding the Fourth Proportional to 204.22, 281.77 and 121.38

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Solution

The fourth proportional to 204.22, 281.77 and 121.38 is: 167.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.22 : 281.77 = 121.38 : x
  2. Step 2: Convert to fraction form
    204.22/281.77 = 121.38/x
  3. Step 3: Cross multiply
    204.22x = 281.77 × 121.38
  4. Step 4: Simplify right side
    204.22x = 34,201.24
  5. Step 5: Solve for x
    x = 34,201.24/204.22
  6. Step 6: Final answer
    x = 167.47

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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.