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Finding the Fourth Proportional to 204.06, 281.45 and 138.45

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Solution

The fourth proportional to 204.06, 281.45 and 138.45 is: 190.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.06 : 281.45 = 138.45 : x
  2. Step 2: Convert to fraction form
    204.06/281.45 = 138.45/x
  3. Step 3: Cross multiply
    204.06x = 281.45 × 138.45
  4. Step 4: Simplify right side
    204.06x = 38,966.06
  5. Step 5: Solve for x
    x = 38,966.06/204.06
  6. Step 6: Final answer
    x = 190.95

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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.