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Finding the Fourth Proportional to 68,769.87, 94,904.87 and 40,107.87

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Solution

The fourth proportional to 68,769.87, 94,904.87 and 40,107.87 is: 55,350.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,769.87 : 94,904.87 = 40,107.87 : x
  2. Step 2: Convert to fraction form
    68,769.87/94,904.87 = 40,107.87/x
  3. Step 3: Cross multiply
    68,769.87x = 94,904.87 × 40,107.87
  4. Step 4: Simplify right side
    68,769.87x = 3,806,432,121.25
  5. Step 5: Solve for x
    x = 3,806,432,121.25/68,769.87
  6. Step 6: Final answer
    x = 55,350.29

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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.