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Finding the Fourth Proportional to 203,817.33, 305,609.36 and 85,388.85

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Solution

The fourth proportional to 203,817.33, 305,609.36 and 85,388.85 is: 128,034.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,817.33 : 305,609.36 = 85,388.85 : x
  2. Step 2: Convert to fraction form
    203,817.33/305,609.36 = 85,388.85/x
  3. Step 3: Cross multiply
    203,817.33x = 305,609.36 × 85,388.85
  4. Step 4: Simplify right side
    203,817.33x = 26,095,631,372.69
  5. Step 5: Solve for x
    x = 26,095,631,372.69/203,817.33
  6. Step 6: Final answer
    x = 128,034.41

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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.