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Finding the Fourth Proportional to 126,491.87, 189,709.86 and 36,515.03

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Solution

The fourth proportional to 126,491.87, 189,709.86 and 36,515.03 is: 54,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,491.87 : 189,709.86 = 36,515.03 : x
  2. Step 2: Convert to fraction form
    126,491.87/189,709.86 = 36,515.03/x
  3. Step 3: Cross multiply
    126,491.87x = 189,709.86 × 36,515.03
  4. Step 4: Simplify right side
    126,491.87x = 6,927,260,855.13
  5. Step 5: Solve for x
    x = 6,927,260,855.13/126,491.87
  6. Step 6: Final answer
    x = 54,764.47

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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.