Home / 85,983.60-128,932.20-39,183.60

Finding the Fourth Proportional to 85,983.60, 128,932.20 and 39,183.60

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Solution

The fourth proportional to 85,983.60, 128,932.20 and 39,183.60 is: 58,755.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,983.60 : 128,932.20 = 39,183.60 : x
  2. Step 2: Convert to fraction form
    85,983.60/128,932.20 = 39,183.60/x
  3. Step 3: Cross multiply
    85,983.60x = 128,932.20 × 39,183.60
  4. Step 4: Simplify right side
    85,983.60x = 5,052,027,751.92
  5. Step 5: Solve for x
    x = 5,052,027,751.92/85,983.60
  6. Step 6: Final answer
    x = 58,755.71

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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.