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Finding the Fourth Proportional to 71,803.92, 99,092.68 and 39,974.84

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Solution

The fourth proportional to 71,803.92, 99,092.68 and 39,974.84 is: 55,167.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,803.92 : 99,092.68 = 39,974.84 : x
  2. Step 2: Convert to fraction form
    71,803.92/99,092.68 = 39,974.84/x
  3. Step 3: Cross multiply
    71,803.92x = 99,092.68 × 39,974.84
  4. Step 4: Simplify right side
    71,803.92x = 3,961,214,028.17
  5. Step 5: Solve for x
    x = 3,961,214,028.17/71,803.92
  6. Step 6: Final answer
    x = 55,167.10

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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.