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Finding the Fourth Proportional to 312,183.51, 430,813.20 and 168,943.56

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Solution

The fourth proportional to 312,183.51, 430,813.20 and 168,943.56 is: 233,142.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,183.51 : 430,813.20 = 168,943.56 : x
  2. Step 2: Convert to fraction form
    312,183.51/430,813.20 = 168,943.56/x
  3. Step 3: Cross multiply
    312,183.51x = 430,813.20 × 168,943.56
  4. Step 4: Simplify right side
    312,183.51x = 72,783,115,702.99
  5. Step 5: Solve for x
    x = 72,783,115,702.99/312,183.51
  6. Step 6: Final answer
    x = 233,142.09

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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.