Home / 80,138.10-120,162.78-32,786.46

Finding the Fourth Proportional to 80,138.10, 120,162.78 and 32,786.46

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Solution

The fourth proportional to 80,138.10, 120,162.78 and 32,786.46 is: 49,161.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,138.10 : 120,162.78 = 32,786.46 : x
  2. Step 2: Convert to fraction form
    80,138.10/120,162.78 = 32,786.46/x
  3. Step 3: Cross multiply
    80,138.10x = 120,162.78 × 32,786.46
  4. Step 4: Simplify right side
    80,138.10x = 3,939,712,179.96
  5. Step 5: Solve for x
    x = 3,939,712,179.96/80,138.10
  6. Step 6: Final answer
    x = 49,161.54

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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.