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Finding the Fourth Proportional to 143,874.52, 198,672.20 and 90,251.70

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Solution

The fourth proportional to 143,874.52, 198,672.20 and 90,251.70 is: 124,625.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,874.52 : 198,672.20 = 90,251.70 : x
  2. Step 2: Convert to fraction form
    143,874.52/198,672.20 = 90,251.70/x
  3. Step 3: Cross multiply
    143,874.52x = 198,672.20 × 90,251.70
  4. Step 4: Simplify right side
    143,874.52x = 17,930,503,792.74
  5. Step 5: Solve for x
    x = 17,930,503,792.74/143,874.52
  6. Step 6: Final answer
    x = 124,625.99

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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.