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Finding the Fourth Proportional to 143,634.88, 198,217.50 and 79,974.04

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Solution

The fourth proportional to 143,634.88, 198,217.50 and 79,974.04 is: 110,364.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,634.88 : 198,217.50 = 79,974.04 : x
  2. Step 2: Convert to fraction form
    143,634.88/198,217.50 = 79,974.04/x
  3. Step 3: Cross multiply
    143,634.88x = 198,217.50 × 79,974.04
  4. Step 4: Simplify right side
    143,634.88x = 15,852,254,273.70
  5. Step 5: Solve for x
    x = 15,852,254,273.70/143,634.88
  6. Step 6: Final answer
    x = 110,364.94

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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.