Home / 100,550.66-138,761.03-55,229.69

Finding the Fourth Proportional to 100,550.66, 138,761.03 and 55,229.69

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Solution

The fourth proportional to 100,550.66, 138,761.03 and 55,229.69 is: 76,217.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,550.66 : 138,761.03 = 55,229.69 : x
  2. Step 2: Convert to fraction form
    100,550.66/138,761.03 = 55,229.69/x
  3. Step 3: Cross multiply
    100,550.66x = 138,761.03 × 55,229.69
  4. Step 4: Simplify right side
    100,550.66x = 7,663,727,701.03
  5. Step 5: Solve for x
    x = 7,663,727,701.03/100,550.66
  6. Step 6: Final answer
    x = 76,217.58

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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.