Home / 220,961.31-331,575.20-78,795.78

Finding the Fourth Proportional to 220,961.31, 331,575.20 and 78,795.78

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Solution

The fourth proportional to 220,961.31, 331,575.20 and 78,795.78 is: 118,241.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,961.31 : 331,575.20 = 78,795.78 : x
  2. Step 2: Convert to fraction form
    220,961.31/331,575.20 = 78,795.78/x
  3. Step 3: Cross multiply
    220,961.31x = 331,575.20 × 78,795.78
  4. Step 4: Simplify right side
    220,961.31x = 26,126,726,512.66
  5. Step 5: Solve for x
    x = 26,126,726,512.66/220,961.31
  6. Step 6: Final answer
    x = 118,241.18

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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.