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Finding the Fourth Proportional to 133.44, 200.20 and 87.88

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Solution

The fourth proportional to 133.44, 200.20 and 87.88 is: 131.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.44 : 200.20 = 87.88 : x
  2. Step 2: Convert to fraction form
    133.44/200.20 = 87.88/x
  3. Step 3: Cross multiply
    133.44x = 200.20 × 87.88
  4. Step 4: Simplify right side
    133.44x = 17,593.58
  5. Step 5: Solve for x
    x = 17,593.58/133.44
  6. Step 6: Final answer
    x = 131.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.