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Finding the Fourth Proportional to 66,806.62, 92,129.50 and 39,944.77

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Solution

The fourth proportional to 66,806.62, 92,129.50 and 39,944.77 is: 55,085.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,806.62 : 92,129.50 = 39,944.77 : x
  2. Step 2: Convert to fraction form
    66,806.62/92,129.50 = 39,944.77/x
  3. Step 3: Cross multiply
    66,806.62x = 92,129.50 × 39,944.77
  4. Step 4: Simplify right side
    66,806.62x = 3,680,091,687.72
  5. Step 5: Solve for x
    x = 3,680,091,687.72/66,806.62
  6. Step 6: Final answer
    x = 55,085.73

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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.