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Finding the Fourth Proportional to 57,189.44, 78,919.52 and 31,694.72

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Solution

The fourth proportional to 57,189.44, 78,919.52 and 31,694.72 is: 43,737.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,189.44 : 78,919.52 = 31,694.72 : x
  2. Step 2: Convert to fraction form
    57,189.44/78,919.52 = 31,694.72/x
  3. Step 3: Cross multiply
    57,189.44x = 78,919.52 × 31,694.72
  4. Step 4: Simplify right side
    57,189.44x = 2,501,332,088.93
  5. Step 5: Solve for x
    x = 2,501,332,088.93/57,189.44
  6. Step 6: Final answer
    x = 43,737.66

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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.