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Finding the Fourth Proportional to 90,612.87, 135,891.56 and 43,202.96

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Solution

The fourth proportional to 90,612.87, 135,891.56 and 43,202.96 is: 64,791.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,612.87 : 135,891.56 = 43,202.96 : x
  2. Step 2: Convert to fraction form
    90,612.87/135,891.56 = 43,202.96/x
  3. Step 3: Cross multiply
    90,612.87x = 135,891.56 × 43,202.96
  4. Step 4: Simplify right side
    90,612.87x = 5,870,918,078.75
  5. Step 5: Solve for x
    x = 5,870,918,078.75/90,612.87
  6. Step 6: Final answer
    x = 64,791.22

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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.