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Finding the Fourth Proportional to 71,808.84, 99,093.96 and 39,976.14

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Solution

The fourth proportional to 71,808.84, 99,093.96 and 39,976.14 is: 55,165.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,808.84 : 99,093.96 = 39,976.14 : x
  2. Step 2: Convert to fraction form
    71,808.84/99,093.96 = 39,976.14/x
  3. Step 3: Cross multiply
    71,808.84x = 99,093.96 × 39,976.14
  4. Step 4: Simplify right side
    71,808.84x = 3,961,394,018.11
  5. Step 5: Solve for x
    x = 3,961,394,018.11/71,808.84
  6. Step 6: Final answer
    x = 55,165.83

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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.