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Finding the Fourth Proportional to 112,456.80, 168,685.20 and 110,512.80

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Solution

The fourth proportional to 112,456.80, 168,685.20 and 110,512.80 is: 165,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,456.80 : 168,685.20 = 110,512.80 : x
  2. Step 2: Convert to fraction form
    112,456.80/168,685.20 = 110,512.80/x
  3. Step 3: Cross multiply
    112,456.80x = 168,685.20 × 110,512.80
  4. Step 4: Simplify right side
    112,456.80x = 18,641,873,770.56
  5. Step 5: Solve for x
    x = 18,641,873,770.56/112,456.80
  6. Step 6: Final answer
    x = 165,769.20

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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.