Home / 100,206.24-150,382.26-80,720.07

Finding the Fourth Proportional to 100,206.24, 150,382.26 and 80,720.07

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Solution

The fourth proportional to 100,206.24, 150,382.26 and 80,720.07 is: 121,138.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,206.24 : 150,382.26 = 80,720.07 : x
  2. Step 2: Convert to fraction form
    100,206.24/150,382.26 = 80,720.07/x
  3. Step 3: Cross multiply
    100,206.24x = 150,382.26 × 80,720.07
  4. Step 4: Simplify right side
    100,206.24x = 12,138,866,553.96
  5. Step 5: Solve for x
    x = 12,138,866,553.96/100,206.24
  6. Step 6: Final answer
    x = 121,138.83

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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.