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Finding the Fourth Proportional to 71,859.43, 99,169.08 and 40,028.35

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Solution

The fourth proportional to 71,859.43, 99,169.08 and 40,028.35 is: 55,240.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,859.43 : 99,169.08 = 40,028.35 : x
  2. Step 2: Convert to fraction form
    71,859.43/99,169.08 = 40,028.35/x
  3. Step 3: Cross multiply
    71,859.43x = 99,169.08 × 40,028.35
  4. Step 4: Simplify right side
    71,859.43x = 3,969,574,643.42
  5. Step 5: Solve for x
    x = 3,969,574,643.42/71,859.43
  6. Step 6: Final answer
    x = 55,240.83

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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.