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Finding the Fourth Proportional to 49,687.75, 74,531.67 and 12,751.75

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Solution

The fourth proportional to 49,687.75, 74,531.67 and 12,751.75 is: 19,127.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,687.75 : 74,531.67 = 12,751.75 : x
  2. Step 2: Convert to fraction form
    49,687.75/74,531.67 = 12,751.75/x
  3. Step 3: Cross multiply
    49,687.75x = 74,531.67 × 12,751.75
  4. Step 4: Simplify right side
    49,687.75x = 950,409,222.92
  5. Step 5: Solve for x
    x = 950,409,222.92/49,687.75
  6. Step 6: Final answer
    x = 19,127.64

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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.