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Finding the Fourth Proportional to 219,286.72, 328,930.11 and 77,236.90

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Solution

The fourth proportional to 219,286.72, 328,930.11 and 77,236.90 is: 115,855.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,286.72 : 328,930.11 = 77,236.90 : x
  2. Step 2: Convert to fraction form
    219,286.72/328,930.11 = 77,236.90/x
  3. Step 3: Cross multiply
    219,286.72x = 328,930.11 × 77,236.90
  4. Step 4: Simplify right side
    219,286.72x = 25,405,542,013.06
  5. Step 5: Solve for x
    x = 25,405,542,013.06/219,286.72
  6. Step 6: Final answer
    x = 115,855.36

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1.5x scale

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.