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Finding the Fourth Proportional to 203,818.33, 305,610.85 and 85,389.85

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Solution

The fourth proportional to 203,818.33, 305,610.85 and 85,389.85 is: 128,035.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,818.33 : 305,610.85 = 85,389.85 : x
  2. Step 2: Convert to fraction form
    203,818.33/305,610.85 = 85,389.85/x
  3. Step 3: Cross multiply
    203,818.33x = 305,610.85 × 85,389.85
  4. Step 4: Simplify right side
    203,818.33x = 26,096,064,639.87
  5. Step 5: Solve for x
    x = 26,096,064,639.87/203,818.33
  6. Step 6: Final answer
    x = 128,035.91

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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.