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Finding the Fourth Proportional to 134.64, 201.61 and 126.78

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Solution

The fourth proportional to 134.64, 201.61 and 126.78 is: 189.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.64 : 201.61 = 126.78 : x
  2. Step 2: Convert to fraction form
    134.64/201.61 = 126.78/x
  3. Step 3: Cross multiply
    134.64x = 201.61 × 126.78
  4. Step 4: Simplify right side
    134.64x = 25,560.16
  5. Step 5: Solve for x
    x = 25,560.16/134.64
  6. Step 6: Final answer
    x = 189.84

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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.