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Finding the Fourth Proportional to 79,786.78, 110,082.87 and 51,508.54

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Solution

The fourth proportional to 79,786.78, 110,082.87 and 51,508.54 is: 71,067.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,786.78 : 110,082.87 = 51,508.54 : x
  2. Step 2: Convert to fraction form
    79,786.78/110,082.87 = 51,508.54/x
  3. Step 3: Cross multiply
    79,786.78x = 110,082.87 × 51,508.54
  4. Step 4: Simplify right side
    79,786.78x = 5,670,207,912.71
  5. Step 5: Solve for x
    x = 5,670,207,912.71/79,786.78
  6. Step 6: Final answer
    x = 71,067.01

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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.