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Finding the Fourth Proportional to 74,862.80, 111,478.82 and 74,034.38

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Solution

The fourth proportional to 74,862.80, 111,478.82 and 74,034.38 is: 110,245.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,862.80 : 111,478.82 = 74,034.38 : x
  2. Step 2: Convert to fraction form
    74,862.80/111,478.82 = 74,034.38/x
  3. Step 3: Cross multiply
    74,862.80x = 111,478.82 × 74,034.38
  4. Step 4: Simplify right side
    74,862.80x = 8,253,265,321.83
  5. Step 5: Solve for x
    x = 8,253,265,321.83/74,862.80
  6. Step 6: Final answer
    x = 110,245.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.