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Finding the Fourth Proportional to 203,916.72, 305,894.52 and 79,267.44

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Solution

The fourth proportional to 203,916.72, 305,894.52 and 79,267.44 is: 118,908.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,916.72 : 305,894.52 = 79,267.44 : x
  2. Step 2: Convert to fraction form
    203,916.72/305,894.52 = 79,267.44/x
  3. Step 3: Cross multiply
    203,916.72x = 305,894.52 × 79,267.44
  4. Step 4: Simplify right side
    203,916.72x = 24,247,475,510.43
  5. Step 5: Solve for x
    x = 24,247,475,510.43/203,916.72
  6. Step 6: Final answer
    x = 118,908.72

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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.