Home / 143,940.20-198,638.34-80,282.10

Finding the Fourth Proportional to 143,940.20, 198,638.34 and 80,282.10

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Solution

The fourth proportional to 143,940.20, 198,638.34 and 80,282.10 is: 110,789.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,940.20 : 198,638.34 = 80,282.10 : x
  2. Step 2: Convert to fraction form
    143,940.20/198,638.34 = 80,282.10/x
  3. Step 3: Cross multiply
    143,940.20x = 198,638.34 × 80,282.10
  4. Step 4: Simplify right side
    143,940.20x = 15,947,103,075.71
  5. Step 5: Solve for x
    x = 15,947,103,075.71/143,940.20
  6. Step 6: Final answer
    x = 110,789.78

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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.