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Finding the Fourth Proportional to 118.32, 163.53 and 93.72

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Solution

The fourth proportional to 118.32, 163.53 and 93.72 is: 129.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.32 : 163.53 = 93.72 : x
  2. Step 2: Convert to fraction form
    118.32/163.53 = 93.72/x
  3. Step 3: Cross multiply
    118.32x = 163.53 × 93.72
  4. Step 4: Simplify right side
    118.32x = 15,326.03
  5. Step 5: Solve for x
    x = 15,326.03/118.32
  6. Step 6: Final answer
    x = 129.53

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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.