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Finding the Fourth Proportional to 126,639, 189,958.68 and 43,533

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Solution

The fourth proportional to 126,639, 189,958.68 and 43,533 is: 65,299.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,639 : 189,958.68 = 43,533 : x
  2. Step 2: Convert to fraction form
    126,639/189,958.68 = 43,533/x
  3. Step 3: Cross multiply
    126,639x = 189,958.68 × 43,533
  4. Step 4: Simplify right side
    126,639x = 8,269,471,216.44
  5. Step 5: Solve for x
    x = 8,269,471,216.44/126,639
  6. Step 6: Final answer
    x = 65,299.56

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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.