Home / 78,079.20-117,110.05-21,921.49

Finding the Fourth Proportional to 78,079.20, 117,110.05 and 21,921.49

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Solution

The fourth proportional to 78,079.20, 117,110.05 and 21,921.49 is: 32,879.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.20 : 117,110.05 = 21,921.49 : x
  2. Step 2: Convert to fraction form
    78,079.20/117,110.05 = 21,921.49/x
  3. Step 3: Cross multiply
    78,079.20x = 117,110.05 × 21,921.49
  4. Step 4: Simplify right side
    78,079.20x = 2,567,226,789.97
  5. Step 5: Solve for x
    x = 2,567,226,789.97/78,079.20
  6. Step 6: Final answer
    x = 32,879.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.