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Finding the Fourth Proportional to 291,441.53, 437,163.11 and 81,079.67

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Solution

The fourth proportional to 291,441.53, 437,163.11 and 81,079.67 is: 121,619.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,441.53 : 437,163.11 = 81,079.67 : x
  2. Step 2: Convert to fraction form
    291,441.53/437,163.11 = 81,079.67/x
  3. Step 3: Cross multiply
    291,441.53x = 437,163.11 × 81,079.67
  4. Step 4: Simplify right side
    291,441.53x = 35,445,040,694.97
  5. Step 5: Solve for x
    x = 35,445,040,694.97/291,441.53
  6. Step 6: Final answer
    x = 121,619.73

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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.