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Finding the Fourth Proportional to 118.11, 163.62 and 115.27

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Solution

The fourth proportional to 118.11, 163.62 and 115.27 is: 159.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.11 : 163.62 = 115.27 : x
  2. Step 2: Convert to fraction form
    118.11/163.62 = 115.27/x
  3. Step 3: Cross multiply
    118.11x = 163.62 × 115.27
  4. Step 4: Simplify right side
    118.11x = 18,860.99
  5. Step 5: Solve for x
    x = 18,860.99/118.11
  6. Step 6: Final answer
    x = 159.69

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.