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Finding the Fourth Proportional to 207,754.62, 311,772.15 and 81,379.19

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Solution

The fourth proportional to 207,754.62, 311,772.15 and 81,379.19 is: 122,123.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,754.62 : 311,772.15 = 81,379.19 : x
  2. Step 2: Convert to fraction form
    207,754.62/311,772.15 = 81,379.19/x
  3. Step 3: Cross multiply
    207,754.62x = 311,772.15 × 81,379.19
  4. Step 4: Simplify right side
    207,754.62x = 25,371,765,031.56
  5. Step 5: Solve for x
    x = 25,371,765,031.56/207,754.62
  6. Step 6: Final answer
    x = 122,123.71

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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.