Home / 80,028.18-120,042.36-20,863.80

Finding the Fourth Proportional to 80,028.18, 120,042.36 and 20,863.80

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Solution

The fourth proportional to 80,028.18, 120,042.36 and 20,863.80 is: 31,295.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,028.18 : 120,042.36 = 20,863.80 : x
  2. Step 2: Convert to fraction form
    80,028.18/120,042.36 = 20,863.80/x
  3. Step 3: Cross multiply
    80,028.18x = 120,042.36 × 20,863.80
  4. Step 4: Simplify right side
    80,028.18x = 2,504,539,790.57
  5. Step 5: Solve for x
    x = 2,504,539,790.57/80,028.18
  6. Step 6: Final answer
    x = 31,295.72

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1.5x scale

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.