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Finding the Fourth Proportional to 71,974.48, 99,249.42 and 61,936.96

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Solution

The fourth proportional to 71,974.48, 99,249.42 and 61,936.96 is: 85,408.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,974.48 : 99,249.42 = 61,936.96 : x
  2. Step 2: Convert to fraction form
    71,974.48/99,249.42 = 61,936.96/x
  3. Step 3: Cross multiply
    71,974.48x = 99,249.42 × 61,936.96
  4. Step 4: Simplify right side
    71,974.48x = 6,147,207,356.56
  5. Step 5: Solve for x
    x = 6,147,207,356.56/71,974.48
  6. Step 6: Final answer
    x = 85,408.15

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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.