Home / 90,819.20-136,228.80-80,451.20

Finding the Fourth Proportional to 90,819.20, 136,228.80 and 80,451.20

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Solution

The fourth proportional to 90,819.20, 136,228.80 and 80,451.20 is: 120,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,819.20 : 136,228.80 = 80,451.20 : x
  2. Step 2: Convert to fraction form
    90,819.20/136,228.80 = 80,451.20/x
  3. Step 3: Cross multiply
    90,819.20x = 136,228.80 × 80,451.20
  4. Step 4: Simplify right side
    90,819.20x = 10,959,770,434.56
  5. Step 5: Solve for x
    x = 10,959,770,434.56/90,819.20
  6. Step 6: Final answer
    x = 120,676.80

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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.