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Finding the Fourth Proportional to 71,859.68, 99,169.43 and 40,028.60

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Solution

The fourth proportional to 71,859.68, 99,169.43 and 40,028.60 is: 55,241.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,859.68 : 99,169.43 = 40,028.60 : x
  2. Step 2: Convert to fraction form
    71,859.68/99,169.43 = 40,028.60/x
  3. Step 3: Cross multiply
    71,859.68x = 99,169.43 × 40,028.60
  4. Step 4: Simplify right side
    71,859.68x = 3,969,613,245.56
  5. Step 5: Solve for x
    x = 3,969,613,245.56/71,859.68
  6. Step 6: Final answer
    x = 55,241.18

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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.