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Finding the Fourth Proportional to 204.52, 282.13 and 139.09

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Solution

The fourth proportional to 204.52, 282.13 and 139.09 is: 191.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.52 : 282.13 = 139.09 : x
  2. Step 2: Convert to fraction form
    204.52/282.13 = 139.09/x
  3. Step 3: Cross multiply
    204.52x = 282.13 × 139.09
  4. Step 4: Simplify right side
    204.52x = 39,241.46
  5. Step 5: Solve for x
    x = 39,241.46/204.52
  6. Step 6: Final answer
    x = 191.87

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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.