Home / 80,785.85-121,234.13-28,195.33

Finding the Fourth Proportional to 80,785.85, 121,234.13 and 28,195.33

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Solution

The fourth proportional to 80,785.85, 121,234.13 and 28,195.33 is: 42,312.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,785.85 : 121,234.13 = 28,195.33 : x
  2. Step 2: Convert to fraction form
    80,785.85/121,234.13 = 28,195.33/x
  3. Step 3: Cross multiply
    80,785.85x = 121,234.13 × 28,195.33
  4. Step 4: Simplify right side
    80,785.85x = 3,418,236,453.27
  5. Step 5: Solve for x
    x = 3,418,236,453.27/80,785.85
  6. Step 6: Final answer
    x = 42,312.32

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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.