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Finding the Fourth Proportional to 216,458.59, 324,687.89 and 131,086.65

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Solution

The fourth proportional to 216,458.59, 324,687.89 and 131,086.65 is: 196,629.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,458.59 : 324,687.89 = 131,086.65 : x
  2. Step 2: Convert to fraction form
    216,458.59/324,687.89 = 131,086.65/x
  3. Step 3: Cross multiply
    216,458.59x = 324,687.89 × 131,086.65
  4. Step 4: Simplify right side
    216,458.59x = 42,562,247,795.67
  5. Step 5: Solve for x
    x = 42,562,247,795.67/216,458.59
  6. Step 6: Final answer
    x = 196,629.98

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