Home / 80,504.40-120,778.20-71,799.60

Finding the Fourth Proportional to 80,504.40, 120,778.20 and 71,799.60

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Solution

The fourth proportional to 80,504.40, 120,778.20 and 71,799.60 is: 107,718.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,504.40 : 120,778.20 = 71,799.60 : x
  2. Step 2: Convert to fraction form
    80,504.40/120,778.20 = 71,799.60/x
  3. Step 3: Cross multiply
    80,504.40x = 120,778.20 × 71,799.60
  4. Step 4: Simplify right side
    80,504.40x = 8,671,826,448.72
  5. Step 5: Solve for x
    x = 8,671,826,448.72/80,504.40
  6. Step 6: Final answer
    x = 107,718.66

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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.