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Finding the Fourth Proportional to 71,796.99, 99,078.12 and 39,965.22

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Solution

The fourth proportional to 71,796.99, 99,078.12 and 39,965.22 is: 55,151.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,796.99 : 99,078.12 = 39,965.22 : x
  2. Step 2: Convert to fraction form
    71,796.99/99,078.12 = 39,965.22/x
  3. Step 3: Cross multiply
    71,796.99x = 99,078.12 × 39,965.22
  4. Step 4: Simplify right side
    71,796.99x = 3,959,678,862.99
  5. Step 5: Solve for x
    x = 3,959,678,862.99/71,796.99
  6. Step 6: Final answer
    x = 55,151.04

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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.