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Finding the Fourth Proportional to 136.44, 203.72 and 117.15

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Solution

The fourth proportional to 136.44, 203.72 and 117.15 is: 174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.44 : 203.72 = 117.15 : x
  2. Step 2: Convert to fraction form
    136.44/203.72 = 117.15/x
  3. Step 3: Cross multiply
    136.44x = 203.72 × 117.15
  4. Step 4: Simplify right side
    136.44x = 23,865.21
  5. Step 5: Solve for x
    x = 23,865.21/136.44
  6. Step 6: Final answer
    x = 174.91

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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.