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Finding the Fourth Proportional to 203.89, 281.30 and 116.51

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Solution

The fourth proportional to 203.89, 281.30 and 116.51 is: 160.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.89 : 281.30 = 116.51 : x
  2. Step 2: Convert to fraction form
    203.89/281.30 = 116.51/x
  3. Step 3: Cross multiply
    203.89x = 281.30 × 116.51
  4. Step 4: Simplify right side
    203.89x = 32,774.26
  5. Step 5: Solve for x
    x = 32,774.26/203.89
  6. Step 6: Final answer
    x = 160.74

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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.