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Finding the Fourth Proportional to 291,439.53, 437,160.11 and 81,077.67

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Solution

The fourth proportional to 291,439.53, 437,160.11 and 81,077.67 is: 121,616.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,439.53 : 437,160.11 = 81,077.67 : x
  2. Step 2: Convert to fraction form
    291,439.53/437,160.11 = 81,077.67/x
  3. Step 3: Cross multiply
    291,439.53x = 437,160.11 × 81,077.67
  4. Step 4: Simplify right side
    291,439.53x = 35,443,922,730.36
  5. Step 5: Solve for x
    x = 35,443,922,730.36/291,439.53
  6. Step 6: Final answer
    x = 121,616.73

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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.