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Finding the Fourth Proportional to 136.36, 188.39 and 115.85

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Solution

The fourth proportional to 136.36, 188.39 and 115.85 is: 160.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.36 : 188.39 = 115.85 : x
  2. Step 2: Convert to fraction form
    136.36/188.39 = 115.85/x
  3. Step 3: Cross multiply
    136.36x = 188.39 × 115.85
  4. Step 4: Simplify right side
    136.36x = 21,825.74
  5. Step 5: Solve for x
    x = 21,825.74/136.36
  6. Step 6: Final answer
    x = 160.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.