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Finding the Fourth Proportional to 207,803.90, 311,859.45 and 83,234.30

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Solution

The fourth proportional to 207,803.90, 311,859.45 and 83,234.30 is: 124,912.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,803.90 : 311,859.45 = 83,234.30 : x
  2. Step 2: Convert to fraction form
    207,803.90/311,859.45 = 83,234.30/x
  3. Step 3: Cross multiply
    207,803.90x = 311,859.45 × 83,234.30
  4. Step 4: Simplify right side
    207,803.90x = 25,957,403,019.14
  5. Step 5: Solve for x
    x = 25,957,403,019.14/207,803.90
  6. Step 6: Final answer
    x = 124,912.97

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1.5x scale

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.