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Finding the Fourth Proportional to 90,591.70, 135,859.87 and 43,181.81

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Solution

The fourth proportional to 90,591.70, 135,859.87 and 43,181.81 is: 64,759.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,591.70 : 135,859.87 = 43,181.81 : x
  2. Step 2: Convert to fraction form
    90,591.70/135,859.87 = 43,181.81/x
  3. Step 3: Cross multiply
    90,591.70x = 135,859.87 × 43,181.81
  4. Step 4: Simplify right side
    90,591.70x = 5,866,675,324.66
  5. Step 5: Solve for x
    x = 5,866,675,324.66/90,591.70
  6. Step 6: Final answer
    x = 64,759.52

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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.