Home / 83,540.40-125,310.30-20,359.80

Finding the Fourth Proportional to 83,540.40, 125,310.30 and 20,359.80

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Solution

The fourth proportional to 83,540.40, 125,310.30 and 20,359.80 is: 30,539.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,540.40 : 125,310.30 = 20,359.80 : x
  2. Step 2: Convert to fraction form
    83,540.40/125,310.30 = 20,359.80/x
  3. Step 3: Cross multiply
    83,540.40x = 125,310.30 × 20,359.80
  4. Step 4: Simplify right side
    83,540.40x = 2,551,292,645.94
  5. Step 5: Solve for x
    x = 2,551,292,645.94/83,540.40
  6. Step 6: Final answer
    x = 30,539.63

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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.