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Finding the Fourth Proportional to 118.38, 163.32 and 92.16

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Solution

The fourth proportional to 118.38, 163.32 and 92.16 is: 127.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.38 : 163.32 = 92.16 : x
  2. Step 2: Convert to fraction form
    118.38/163.32 = 92.16/x
  3. Step 3: Cross multiply
    118.38x = 163.32 × 92.16
  4. Step 4: Simplify right side
    118.38x = 15,051.57
  5. Step 5: Solve for x
    x = 15,051.57/118.38
  6. Step 6: Final answer
    x = 127.15

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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.