Home / 120,786.20-181,179.30-109,899.80

Finding the Fourth Proportional to 120,786.20, 181,179.30 and 109,899.80

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Solution

The fourth proportional to 120,786.20, 181,179.30 and 109,899.80 is: 164,849.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,786.20 : 181,179.30 = 109,899.80 : x
  2. Step 2: Convert to fraction form
    120,786.20/181,179.30 = 109,899.80/x
  3. Step 3: Cross multiply
    120,786.20x = 181,179.30 × 109,899.80
  4. Step 4: Simplify right side
    120,786.20x = 19,911,568,834.14
  5. Step 5: Solve for x
    x = 19,911,568,834.14/120,786.20
  6. Step 6: Final answer
    x = 164,849.70

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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.