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Finding the Fourth Proportional to 71,862.74, 99,173.64 and 40,031.64

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Solution

The fourth proportional to 71,862.74, 99,173.64 and 40,031.64 is: 55,245.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,862.74 : 99,173.64 = 40,031.64 : x
  2. Step 2: Convert to fraction form
    71,862.74/99,173.64 = 40,031.64/x
  3. Step 3: Cross multiply
    71,862.74x = 99,173.64 × 40,031.64
  4. Step 4: Simplify right side
    71,862.74x = 3,970,083,453.97
  5. Step 5: Solve for x
    x = 3,970,083,453.97/71,862.74
  6. Step 6: Final answer
    x = 55,245.37

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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.