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Finding the Fourth Proportional to 40,728.10, 61,093.78 and 19,375.70

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Solution

The fourth proportional to 40,728.10, 61,093.78 and 19,375.70 is: 29,064.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,728.10 : 61,093.78 = 19,375.70 : x
  2. Step 2: Convert to fraction form
    40,728.10/61,093.78 = 19,375.70/x
  3. Step 3: Cross multiply
    40,728.10x = 61,093.78 × 19,375.70
  4. Step 4: Simplify right side
    40,728.10x = 1,183,734,753.15
  5. Step 5: Solve for x
    x = 1,183,734,753.15/40,728.10
  6. Step 6: Final answer
    x = 29,064.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.