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Finding the Fourth Proportional to 203.78, 281.25 and 116.48

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Solution

The fourth proportional to 203.78, 281.25 and 116.48 is: 160.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.78 : 281.25 = 116.48 : x
  2. Step 2: Convert to fraction form
    203.78/281.25 = 116.48/x
  3. Step 3: Cross multiply
    203.78x = 281.25 × 116.48
  4. Step 4: Simplify right side
    203.78x = 32,760
  5. Step 5: Solve for x
    x = 32,760/203.78
  6. Step 6: Final answer
    x = 160.76

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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.