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Finding the Fourth Proportional to 64,771.88, 89,378.82 and 47,785.27

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Solution

The fourth proportional to 64,771.88, 89,378.82 and 47,785.27 is: 65,938.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,771.88 : 89,378.82 = 47,785.27 : x
  2. Step 2: Convert to fraction form
    64,771.88/89,378.82 = 47,785.27/x
  3. Step 3: Cross multiply
    64,771.88x = 89,378.82 × 47,785.27
  4. Step 4: Simplify right side
    64,771.88x = 4,270,990,604.35
  5. Step 5: Solve for x
    x = 4,270,990,604.35/64,771.88
  6. Step 6: Final answer
    x = 65,938.97

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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.