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Finding the Fourth Proportional to 207,843.35, 311,640.08 and 81,332.69

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Solution

The fourth proportional to 207,843.35, 311,640.08 and 81,332.69 is: 121,950.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,843.35 : 311,640.08 = 81,332.69 : x
  2. Step 2: Convert to fraction form
    207,843.35/311,640.08 = 81,332.69/x
  3. Step 3: Cross multiply
    207,843.35x = 311,640.08 × 81,332.69
  4. Step 4: Simplify right side
    207,843.35x = 25,346,524,053.35
  5. Step 5: Solve for x
    x = 25,346,524,053.35/207,843.35
  6. Step 6: Final answer
    x = 121,950.14

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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.