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Finding the Fourth Proportional to 90,644, 135,868.80 and 43,793.60

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Solution

The fourth proportional to 90,644, 135,868.80 and 43,793.60 is: 65,643.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644 : 135,868.80 = 43,793.60 : x
  2. Step 2: Convert to fraction form
    90,644/135,868.80 = 43,793.60/x
  3. Step 3: Cross multiply
    90,644x = 135,868.80 × 43,793.60
  4. Step 4: Simplify right side
    90,644x = 5,950,183,879.68
  5. Step 5: Solve for x
    x = 5,950,183,879.68/90,644
  6. Step 6: Final answer
    x = 65,643.44

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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.