Home / 143,991.82-198,704.07-78,578.14

Finding the Fourth Proportional to 143,991.82, 198,704.07 and 78,578.14

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Solution

The fourth proportional to 143,991.82, 198,704.07 and 78,578.14 is: 108,435.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,991.82 : 198,704.07 = 78,578.14 : x
  2. Step 2: Convert to fraction form
    143,991.82/198,704.07 = 78,578.14/x
  3. Step 3: Cross multiply
    143,991.82x = 198,704.07 × 78,578.14
  4. Step 4: Simplify right side
    143,991.82x = 15,613,796,231.03
  5. Step 5: Solve for x
    x = 15,613,796,231.03/143,991.82
  6. Step 6: Final answer
    x = 108,435.30

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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.