Home / 100,550.15-138,760.34-55,229.18

Finding the Fourth Proportional to 100,550.15, 138,760.34 and 55,229.18

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Solution

The fourth proportional to 100,550.15, 138,760.34 and 55,229.18 is: 76,216.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,550.15 : 138,760.34 = 55,229.18 : x
  2. Step 2: Convert to fraction form
    100,550.15/138,760.34 = 55,229.18/x
  3. Step 3: Cross multiply
    100,550.15x = 138,760.34 × 55,229.18
  4. Step 4: Simplify right side
    100,550.15x = 7,663,619,865.48
  5. Step 5: Solve for x
    x = 7,663,619,865.48/100,550.15
  6. Step 6: Final answer
    x = 76,216.89

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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.