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Finding the Fourth Proportional to 100,793.38, 139,104.19 and 55,480.56

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Solution

The fourth proportional to 100,793.38, 139,104.19 and 55,480.56 is: 76,568.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,793.38 : 139,104.19 = 55,480.56 : x
  2. Step 2: Convert to fraction form
    100,793.38/139,104.19 = 55,480.56/x
  3. Step 3: Cross multiply
    100,793.38x = 139,104.19 × 55,480.56
  4. Step 4: Simplify right side
    100,793.38x = 7,717,578,377.64
  5. Step 5: Solve for x
    x = 7,717,578,377.64/100,793.38
  6. Step 6: Final answer
    x = 76,568.31

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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.