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Finding the Fourth Proportional to 71,794.89, 99,080.25 and 39,965.85

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Solution

The fourth proportional to 71,794.89, 99,080.25 and 39,965.85 is: 55,154.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,794.89 : 99,080.25 = 39,965.85 : x
  2. Step 2: Convert to fraction form
    71,794.89/99,080.25 = 39,965.85/x
  3. Step 3: Cross multiply
    71,794.89x = 99,080.25 × 39,965.85
  4. Step 4: Simplify right side
    71,794.89x = 3,959,826,409.46
  5. Step 5: Solve for x
    x = 3,959,826,409.46/71,794.89
  6. Step 6: Final answer
    x = 55,154.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.