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Finding the Fourth Proportional to 110,676.80, 165,817.20 and 67,320.80

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Solution

The fourth proportional to 110,676.80, 165,817.20 and 67,320.80 is: 100,860.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,676.80 : 165,817.20 = 67,320.80 : x
  2. Step 2: Convert to fraction form
    110,676.80/165,817.20 = 67,320.80/x
  3. Step 3: Cross multiply
    110,676.80x = 165,817.20 × 67,320.80
  4. Step 4: Simplify right side
    110,676.80x = 11,162,946,557.76
  5. Step 5: Solve for x
    x = 11,162,946,557.76/110,676.80
  6. Step 6: Final answer
    x = 100,860.76

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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.