Home / 80,647.20-120,981.60-28,072.80

Finding the Fourth Proportional to 80,647.20, 120,981.60 and 28,072.80

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Solution

The fourth proportional to 80,647.20, 120,981.60 and 28,072.80 is: 42,112.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,647.20 : 120,981.60 = 28,072.80 : x
  2. Step 2: Convert to fraction form
    80,647.20/120,981.60 = 28,072.80/x
  3. Step 3: Cross multiply
    80,647.20x = 120,981.60 × 28,072.80
  4. Step 4: Simplify right side
    80,647.20x = 3,396,292,260.48
  5. Step 5: Solve for x
    x = 3,396,292,260.48/80,647.20
  6. Step 6: Final answer
    x = 42,112.96

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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.