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Finding the Fourth Proportional to 203,156.57, 280,216.82 and 139,383.65

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Solution

The fourth proportional to 203,156.57, 280,216.82 and 139,383.65 is: 192,253.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,156.57 : 280,216.82 = 139,383.65 : x
  2. Step 2: Convert to fraction form
    203,156.57/280,216.82 = 139,383.65/x
  3. Step 3: Cross multiply
    203,156.57x = 280,216.82 × 139,383.65
  4. Step 4: Simplify right side
    203,156.57x = 39,057,644,211.99
  5. Step 5: Solve for x
    x = 39,057,644,211.99/203,156.57
  6. Step 6: Final answer
    x = 192,253.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.