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Finding the Fourth Proportional to 172,990.20, 259,874.10 and 168,324.60

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Solution

The fourth proportional to 172,990.20, 259,874.10 and 168,324.60 is: 252,865.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,990.20 : 259,874.10 = 168,324.60 : x
  2. Step 2: Convert to fraction form
    172,990.20/259,874.10 = 168,324.60/x
  3. Step 3: Cross multiply
    172,990.20x = 259,874.10 × 168,324.60
  4. Step 4: Simplify right side
    172,990.20x = 43,743,203,932.86
  5. Step 5: Solve for x
    x = 43,743,203,932.86/172,990.20
  6. Step 6: Final answer
    x = 252,865.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.