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Finding the Fourth Proportional to 207,718.15, 311,629.76 and 57,958.37

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Solution

The fourth proportional to 207,718.15, 311,629.76 and 57,958.37 is: 86,952.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,718.15 : 311,629.76 = 57,958.37 : x
  2. Step 2: Convert to fraction form
    207,718.15/311,629.76 = 57,958.37/x
  3. Step 3: Cross multiply
    207,718.15x = 311,629.76 × 57,958.37
  4. Step 4: Simplify right side
    207,718.15x = 18,061,552,643.30
  5. Step 5: Solve for x
    x = 18,061,552,643.30/207,718.15
  6. Step 6: Final answer
    x = 86,952.21

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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.