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Finding the Fourth Proportional to 71,695.65, 98,940.65 and 39,863.73

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Solution

The fourth proportional to 71,695.65, 98,940.65 and 39,863.73 is: 55,012.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,695.65 : 98,940.65 = 39,863.73 : x
  2. Step 2: Convert to fraction form
    71,695.65/98,940.65 = 39,863.73/x
  3. Step 3: Cross multiply
    71,695.65x = 98,940.65 × 39,863.73
  4. Step 4: Simplify right side
    71,695.65x = 3,944,143,357.62
  5. Step 5: Solve for x
    x = 3,944,143,357.62/71,695.65
  6. Step 6: Final answer
    x = 55,012.31

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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.