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Finding the Fourth Proportional to 143,969.70, 198,676.83 and 79,439.52

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Solution

The fourth proportional to 143,969.70, 198,676.83 and 79,439.52 is: 109,625.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,969.70 : 198,676.83 = 79,439.52 : x
  2. Step 2: Convert to fraction form
    143,969.70/198,676.83 = 79,439.52/x
  3. Step 3: Cross multiply
    143,969.70x = 198,676.83 × 79,439.52
  4. Step 4: Simplify right side
    143,969.70x = 15,782,792,010.32
  5. Step 5: Solve for x
    x = 15,782,792,010.32/143,969.70
  6. Step 6: Final answer
    x = 109,625.79

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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.