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Finding the Fourth Proportional to 109.38, 163.28 and 94.26

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Solution

The fourth proportional to 109.38, 163.28 and 94.26 is: 140.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.38 : 163.28 = 94.26 : x
  2. Step 2: Convert to fraction form
    109.38/163.28 = 94.26/x
  3. Step 3: Cross multiply
    109.38x = 163.28 × 94.26
  4. Step 4: Simplify right side
    109.38x = 15,390.77
  5. Step 5: Solve for x
    x = 15,390.77/109.38
  6. Step 6: Final answer
    x = 140.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.