Home / 109,654.20-164,481.30-80,129.70

Finding the Fourth Proportional to 109,654.20, 164,481.30 and 80,129.70

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Solution

The fourth proportional to 109,654.20, 164,481.30 and 80,129.70 is: 120,194.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,654.20 : 164,481.30 = 80,129.70 : x
  2. Step 2: Convert to fraction form
    109,654.20/164,481.30 = 80,129.70/x
  3. Step 3: Cross multiply
    109,654.20x = 164,481.30 × 80,129.70
  4. Step 4: Simplify right side
    109,654.20x = 13,179,837,224.61
  5. Step 5: Solve for x
    x = 13,179,837,224.61/109,654.20
  6. Step 6: Final answer
    x = 120,194.55

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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.