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Finding the Fourth Proportional to 136.28, 203.42 and 120.26

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Solution

The fourth proportional to 136.28, 203.42 and 120.26 is: 179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.28 : 203.42 = 120.26 : x
  2. Step 2: Convert to fraction form
    136.28/203.42 = 120.26/x
  3. Step 3: Cross multiply
    136.28x = 203.42 × 120.26
  4. Step 4: Simplify right side
    136.28x = 24,463.29
  5. Step 5: Solve for x
    x = 24,463.29/136.28
  6. Step 6: Final answer
    x = 179.51

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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.