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Finding the Fourth Proportional to 72,191.64, 108,305.91 and 27,806.48

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Solution

The fourth proportional to 72,191.64, 108,305.91 and 27,806.48 is: 41,716.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,191.64 : 108,305.91 = 27,806.48 : x
  2. Step 2: Convert to fraction form
    72,191.64/108,305.91 = 27,806.48/x
  3. Step 3: Cross multiply
    72,191.64x = 108,305.91 × 27,806.48
  4. Step 4: Simplify right side
    72,191.64x = 3,011,605,578.77
  5. Step 5: Solve for x
    x = 3,011,605,578.77/72,191.64
  6. Step 6: Final answer
    x = 41,716.82

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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.