Home / 143,947.50-198,640.61-78,532.43

Finding the Fourth Proportional to 143,947.50, 198,640.61 and 78,532.43

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Solution

The fourth proportional to 143,947.50, 198,640.61 and 78,532.43 is: 108,370.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,947.50 : 198,640.61 = 78,532.43 : x
  2. Step 2: Convert to fraction form
    143,947.50/198,640.61 = 78,532.43/x
  3. Step 3: Cross multiply
    143,947.50x = 198,640.61 × 78,532.43
  4. Step 4: Simplify right side
    143,947.50x = 15,599,729,799.98
  5. Step 5: Solve for x
    x = 15,599,729,799.98/143,947.50
  6. Step 6: Final answer
    x = 108,370.97

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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.