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Finding the Fourth Proportional to 136.48, 203.69 and 120.28

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Solution

The fourth proportional to 136.48, 203.69 and 120.28 is: 179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.48 : 203.69 = 120.28 : x
  2. Step 2: Convert to fraction form
    136.48/203.69 = 120.28/x
  3. Step 3: Cross multiply
    136.48x = 203.69 × 120.28
  4. Step 4: Simplify right side
    136.48x = 24,499.83
  5. Step 5: Solve for x
    x = 24,499.83/136.48
  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.