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Finding the Fourth Proportional to 74,231.60, 111,201.60 and 68,982.80

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Solution

The fourth proportional to 74,231.60, 111,201.60 and 68,982.80 is: 103,338.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,231.60 : 111,201.60 = 68,982.80 : x
  2. Step 2: Convert to fraction form
    74,231.60/111,201.60 = 68,982.80/x
  3. Step 3: Cross multiply
    74,231.60x = 111,201.60 × 68,982.80
  4. Step 4: Simplify right side
    74,231.60x = 7,670,997,732.48
  5. Step 5: Solve for x
    x = 7,670,997,732.48/74,231.60
  6. Step 6: Final answer
    x = 103,338.71

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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.