Home / 185,640.11-278,415.53-85,704.31

Finding the Fourth Proportional to 185,640.11, 278,415.53 and 85,704.31

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Solution

The fourth proportional to 185,640.11, 278,415.53 and 85,704.31 is: 128,535.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,640.11 : 278,415.53 = 85,704.31 : x
  2. Step 2: Convert to fraction form
    185,640.11/278,415.53 = 85,704.31/x
  3. Step 3: Cross multiply
    185,640.11x = 278,415.53 × 85,704.31
  4. Step 4: Simplify right side
    185,640.11x = 23,861,409,499.86
  5. Step 5: Solve for x
    x = 23,861,409,499.86/185,640.11
  6. Step 6: Final answer
    x = 128,535.85

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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.