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Finding the Fourth Proportional to 123,780.39, 170,769.11 and 70,053.09

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Solution

The fourth proportional to 123,780.39, 170,769.11 and 70,053.09 is: 96,646.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,780.39 : 170,769.11 = 70,053.09 : x
  2. Step 2: Convert to fraction form
    123,780.39/170,769.11 = 70,053.09/x
  3. Step 3: Cross multiply
    123,780.39x = 170,769.11 × 70,053.09
  4. Step 4: Simplify right side
    123,780.39x = 11,962,903,481.78
  5. Step 5: Solve for x
    x = 11,962,903,481.78/123,780.39
  6. Step 6: Final answer
    x = 96,646.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.