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Finding the Fourth Proportional to 127,676.80, 191,515.20 and 113,898.70

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Solution

The fourth proportional to 127,676.80, 191,515.20 and 113,898.70 is: 170,848.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,676.80 : 191,515.20 = 113,898.70 : x
  2. Step 2: Convert to fraction form
    127,676.80/191,515.20 = 113,898.70/x
  3. Step 3: Cross multiply
    127,676.80x = 191,515.20 × 113,898.70
  4. Step 4: Simplify right side
    127,676.80x = 21,813,332,310.24
  5. Step 5: Solve for x
    x = 21,813,332,310.24/127,676.80
  6. Step 6: Final answer
    x = 170,848.05

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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.