Home / 80,563.20-120,729.60-55,910.40

Finding the Fourth Proportional to 80,563.20, 120,729.60 and 55,910.40

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Solution

The fourth proportional to 80,563.20, 120,729.60 and 55,910.40 is: 83,785.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,563.20 : 120,729.60 = 55,910.40 : x
  2. Step 2: Convert to fraction form
    80,563.20/120,729.60 = 55,910.40/x
  3. Step 3: Cross multiply
    80,563.20x = 120,729.60 × 55,910.40
  4. Step 4: Simplify right side
    80,563.20x = 6,750,040,227.84
  5. Step 5: Solve for x
    x = 6,750,040,227.84/80,563.20
  6. Step 6: Final answer
    x = 83,785.65

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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.