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Finding the Fourth Proportional to 90,644.75, 135,869.93 and 43,794.35

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Solution

The fourth proportional to 90,644.75, 135,869.93 and 43,794.35 is: 65,644.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644.75 : 135,869.93 = 43,794.35 : x
  2. Step 2: Convert to fraction form
    90,644.75/135,869.93 = 43,794.35/x
  3. Step 3: Cross multiply
    90,644.75x = 135,869.93 × 43,794.35
  4. Step 4: Simplify right side
    90,644.75x = 5,950,335,049.92
  5. Step 5: Solve for x
    x = 5,950,335,049.92/90,644.75
  6. Step 6: Final answer
    x = 65,644.56

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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.