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Finding the Fourth Proportional to 118.60, 163.29 and 112.53

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Solution

The fourth proportional to 118.60, 163.29 and 112.53 is: 154.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.60 : 163.29 = 112.53 : x
  2. Step 2: Convert to fraction form
    118.60/163.29 = 112.53/x
  3. Step 3: Cross multiply
    118.60x = 163.29 × 112.53
  4. Step 4: Simplify right side
    118.60x = 18,375.02
  5. Step 5: Solve for x
    x = 18,375.02/118.60
  6. Step 6: Final answer
    x = 154.93

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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.