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Finding the Fourth Proportional to 203.91, 281.41 and 121.04

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Solution

The fourth proportional to 203.91, 281.41 and 121.04 is: 167.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.91 : 281.41 = 121.04 : x
  2. Step 2: Convert to fraction form
    203.91/281.41 = 121.04/x
  3. Step 3: Cross multiply
    203.91x = 281.41 × 121.04
  4. Step 4: Simplify right side
    203.91x = 34,062.17
  5. Step 5: Solve for x
    x = 34,062.17/203.91
  6. Step 6: Final answer
    x = 167.05

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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.