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Finding the Fourth Proportional to 134.41, 201.18 and 121.78

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Solution

The fourth proportional to 134.41, 201.18 and 121.78 is: 182.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.41 : 201.18 = 121.78 : x
  2. Step 2: Convert to fraction form
    134.41/201.18 = 121.78/x
  3. Step 3: Cross multiply
    134.41x = 201.18 × 121.78
  4. Step 4: Simplify right side
    134.41x = 24,499.20
  5. Step 5: Solve for x
    x = 24,499.20/134.41
  6. Step 6: Final answer
    x = 182.28

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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.