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Finding the Fourth Proportional to 291,440.53, 437,161.61 and 81,078.67

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Solution

The fourth proportional to 291,440.53, 437,161.61 and 81,078.67 is: 121,618.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,440.53 : 437,161.61 = 81,078.67 : x
  2. Step 2: Convert to fraction form
    291,440.53/437,161.61 = 81,078.67/x
  3. Step 3: Cross multiply
    291,440.53x = 437,161.61 × 81,078.67
  4. Step 4: Simplify right side
    291,440.53x = 35,444,481,913.86
  5. Step 5: Solve for x
    x = 35,444,481,913.86/291,440.53
  6. Step 6: Final answer
    x = 121,618.23

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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.