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Finding the Fourth Proportional to 133.24, 199.86 and 87.88

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Solution

The fourth proportional to 133.24, 199.86 and 87.88 is: 131.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.24 : 199.86 = 87.88 : x
  2. Step 2: Convert to fraction form
    133.24/199.86 = 87.88/x
  3. Step 3: Cross multiply
    133.24x = 199.86 × 87.88
  4. Step 4: Simplify right side
    133.24x = 17,563.70
  5. Step 5: Solve for x
    x = 17,563.70/133.24
  6. Step 6: Final answer
    x = 131.82

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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.