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Finding the Fourth Proportional to 203,585.90, 305,497.92 and 85,247.33

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Solution

The fourth proportional to 203,585.90, 305,497.92 and 85,247.33 is: 127,920.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,585.90 : 305,497.92 = 85,247.33 : x
  2. Step 2: Convert to fraction form
    203,585.90/305,497.92 = 85,247.33/x
  3. Step 3: Cross multiply
    203,585.90x = 305,497.92 × 85,247.33
  4. Step 4: Simplify right side
    203,585.90x = 26,042,882,000.55
  5. Step 5: Solve for x
    x = 26,042,882,000.55/203,585.90
  6. Step 6: Final answer
    x = 127,920.85

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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.