Home / 207,711.12-311,441.91-81,200.69

Finding the Fourth Proportional to 207,711.12, 311,441.91 and 81,200.69

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Solution

The fourth proportional to 207,711.12, 311,441.91 and 81,200.69 is: 121,752.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,711.12 : 311,441.91 = 81,200.69 : x
  2. Step 2: Convert to fraction form
    207,711.12/311,441.91 = 81,200.69/x
  3. Step 3: Cross multiply
    207,711.12x = 311,441.91 × 81,200.69
  4. Step 4: Simplify right side
    207,711.12x = 25,289,296,429.71
  5. Step 5: Solve for x
    x = 25,289,296,429.71/207,711.12
  6. Step 6: Final answer
    x = 121,752.25

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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.