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Finding the Fourth Proportional to 71,879.41, 99,193.71 and 40,049.44

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Solution

The fourth proportional to 71,879.41, 99,193.71 and 40,049.44 is: 55,268.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,879.41 : 99,193.71 = 40,049.44 : x
  2. Step 2: Convert to fraction form
    71,879.41/99,193.71 = 40,049.44/x
  3. Step 3: Cross multiply
    71,879.41x = 99,193.71 × 40,049.44
  4. Step 4: Simplify right side
    71,879.41x = 3,972,652,537.02
  5. Step 5: Solve for x
    x = 3,972,652,537.02/71,879.41
  6. Step 6: Final answer
    x = 55,268.30

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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.