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Finding the Fourth Proportional to 68,665.50, 94,750.41 and 39,991.43

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Solution

The fourth proportional to 68,665.50, 94,750.41 and 39,991.43 is: 55,183.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,665.50 : 94,750.41 = 39,991.43 : x
  2. Step 2: Convert to fraction form
    68,665.50/94,750.41 = 39,991.43/x
  3. Step 3: Cross multiply
    68,665.50x = 94,750.41 × 39,991.43
  4. Step 4: Simplify right side
    68,665.50x = 3,789,204,775.83
  5. Step 5: Solve for x
    x = 3,789,204,775.83/68,665.50
  6. Step 6: Final answer
    x = 55,183.53

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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.