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Finding the Fourth Proportional to 143,872.01, 198,668.74 and 90,249.20

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Solution

The fourth proportional to 143,872.01, 198,668.74 and 90,249.20 is: 124,622.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,872.01 : 198,668.74 = 90,249.20 : x
  2. Step 2: Convert to fraction form
    143,872.01/198,668.74 = 90,249.20/x
  3. Step 3: Cross multiply
    143,872.01x = 198,668.74 × 90,249.20
  4. Step 4: Simplify right side
    143,872.01x = 17,929,694,850.01
  5. Step 5: Solve for x
    x = 17,929,694,850.01/143,872.01
  6. Step 6: Final answer
    x = 124,622.54

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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.