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Finding the Fourth Proportional to 74,651.60, 103,017.66 and 40,660.48

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Solution

The fourth proportional to 74,651.60, 103,017.66 and 40,660.48 is: 56,110.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,651.60 : 103,017.66 = 40,660.48 : x
  2. Step 2: Convert to fraction form
    74,651.60/103,017.66 = 40,660.48/x
  3. Step 3: Cross multiply
    74,651.60x = 103,017.66 × 40,660.48
  4. Step 4: Simplify right side
    74,651.60x = 4,188,747,504.08
  5. Step 5: Solve for x
    x = 4,188,747,504.08/74,651.60
  6. Step 6: Final answer
    x = 56,110.62

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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.