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Finding the Fourth Proportional to 71,911.44, 99,240.12 and 40,087.08

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Solution

The fourth proportional to 71,911.44, 99,240.12 and 40,087.08 is: 55,321.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,911.44 : 99,240.12 = 40,087.08 : x
  2. Step 2: Convert to fraction form
    71,911.44/99,240.12 = 40,087.08/x
  3. Step 3: Cross multiply
    71,911.44x = 99,240.12 × 40,087.08
  4. Step 4: Simplify right side
    71,911.44x = 3,978,246,629.65
  5. Step 5: Solve for x
    x = 3,978,246,629.65/71,911.44
  6. Step 6: Final answer
    x = 55,321.47

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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.