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Finding the Fourth Proportional to 71,912.83, 99,243.11 and 40,081.96

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Solution

The fourth proportional to 71,912.83, 99,243.11 and 40,081.96 is: 55,315.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,912.83 : 99,243.11 = 40,081.96 : x
  2. Step 2: Convert to fraction form
    71,912.83/99,243.11 = 40,081.96/x
  3. Step 3: Cross multiply
    71,912.83x = 99,243.11 × 40,081.96
  4. Step 4: Simplify right side
    71,912.83x = 3,977,858,365.30
  5. Step 5: Solve for x
    x = 3,977,858,365.30/71,912.83
  6. Step 6: Final answer
    x = 55,315.00

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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.