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Finding the Fourth Proportional to 74,202.57, 102,395.19 and 43,990.78

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Solution

The fourth proportional to 74,202.57, 102,395.19 and 43,990.78 is: 60,704.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,202.57 : 102,395.19 = 43,990.78 : x
  2. Step 2: Convert to fraction form
    74,202.57/102,395.19 = 43,990.78/x
  3. Step 3: Cross multiply
    74,202.57x = 102,395.19 × 43,990.78
  4. Step 4: Simplify right side
    74,202.57x = 4,504,444,276.35
  5. Step 5: Solve for x
    x = 4,504,444,276.35/74,202.57
  6. Step 6: Final answer
    x = 60,704.69

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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.