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Finding the Fourth Proportional to 133.62, 183.96 and 126.78

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Solution

The fourth proportional to 133.62, 183.96 and 126.78 is: 174.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.62 : 183.96 = 126.78 : x
  2. Step 2: Convert to fraction form
    133.62/183.96 = 126.78/x
  3. Step 3: Cross multiply
    133.62x = 183.96 × 126.78
  4. Step 4: Simplify right side
    133.62x = 23,322.45
  5. Step 5: Solve for x
    x = 23,322.45/133.62
  6. Step 6: Final answer
    x = 174.54

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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.