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Finding the Fourth Proportional to 66,571.91, 99,859.92 and 29,112.70

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Solution

The fourth proportional to 66,571.91, 99,859.92 and 29,112.70 is: 43,669.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,571.91 : 99,859.92 = 29,112.70 : x
  2. Step 2: Convert to fraction form
    66,571.91/99,859.92 = 29,112.70/x
  3. Step 3: Cross multiply
    66,571.91x = 99,859.92 × 29,112.70
  4. Step 4: Simplify right side
    66,571.91x = 2,907,191,892.98
  5. Step 5: Solve for x
    x = 2,907,191,892.98/66,571.91
  6. Step 6: Final answer
    x = 43,669.95

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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.