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Finding the Fourth Proportional to 204.02, 281.36 and 138.61

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Solution

The fourth proportional to 204.02, 281.36 and 138.61 is: 191.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.02 : 281.36 = 138.61 : x
  2. Step 2: Convert to fraction form
    204.02/281.36 = 138.61/x
  3. Step 3: Cross multiply
    204.02x = 281.36 × 138.61
  4. Step 4: Simplify right side
    204.02x = 38,998.95
  5. Step 5: Solve for x
    x = 38,998.95/204.02
  6. Step 6: Final answer
    x = 191.16

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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.