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Finding the Fourth Proportional to 118.42, 163.28 and 95.20

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Solution

The fourth proportional to 118.42, 163.28 and 95.20 is: 131.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.42 : 163.28 = 95.20 : x
  2. Step 2: Convert to fraction form
    118.42/163.28 = 95.20/x
  3. Step 3: Cross multiply
    118.42x = 163.28 × 95.20
  4. Step 4: Simplify right side
    118.42x = 15,544.26
  5. Step 5: Solve for x
    x = 15,544.26/118.42
  6. Step 6: Final answer
    x = 131.26

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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.