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Finding the Fourth Proportional to 185,512.59, 278,246.21 and 78,939.41

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Solution

The fourth proportional to 185,512.59, 278,246.21 and 78,939.41 is: 118,399.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,512.59 : 278,246.21 = 78,939.41 : x
  2. Step 2: Convert to fraction form
    185,512.59/278,246.21 = 78,939.41/x
  3. Step 3: Cross multiply
    185,512.59x = 278,246.21 × 78,939.41
  4. Step 4: Simplify right side
    185,512.59x = 21,964,589,866.21
  5. Step 5: Solve for x
    x = 21,964,589,866.21/185,512.59
  6. Step 6: Final answer
    x = 118,399.46

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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.