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Finding the Fourth Proportional to 133.96, 199.98 and 113.45

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Solution

The fourth proportional to 133.96, 199.98 and 113.45 is: 169.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.96 : 199.98 = 113.45 : x
  2. Step 2: Convert to fraction form
    133.96/199.98 = 113.45/x
  3. Step 3: Cross multiply
    133.96x = 199.98 × 113.45
  4. Step 4: Simplify right side
    133.96x = 22,687.73
  5. Step 5: Solve for x
    x = 22,687.73/133.96
  6. Step 6: Final answer
    x = 169.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.