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Finding the Fourth Proportional to 71,912.62, 99,239.88 and 40,083.54

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Solution

The fourth proportional to 71,912.62, 99,239.88 and 40,083.54 is: 55,315.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,912.62 : 99,239.88 = 40,083.54 : x
  2. Step 2: Convert to fraction form
    71,912.62/99,239.88 = 40,083.54/x
  3. Step 3: Cross multiply
    71,912.62x = 99,239.88 × 40,083.54
  4. Step 4: Simplify right side
    71,912.62x = 3,977,885,002.96
  5. Step 5: Solve for x
    x = 3,977,885,002.96/71,912.62
  6. Step 6: Final answer
    x = 55,315.53

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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.