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Finding the Fourth Proportional to 65,163.03, 89,939.01 and 39,677.80

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Solution

The fourth proportional to 65,163.03, 89,939.01 and 39,677.80 is: 54,763.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,163.03 : 89,939.01 = 39,677.80 : x
  2. Step 2: Convert to fraction form
    65,163.03/89,939.01 = 39,677.80/x
  3. Step 3: Cross multiply
    65,163.03x = 89,939.01 × 39,677.80
  4. Step 4: Simplify right side
    65,163.03x = 3,568,581,920.37
  5. Step 5: Solve for x
    x = 3,568,581,920.37/65,163.03
  6. Step 6: Final answer
    x = 54,763.90

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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.