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Finding the Fourth Proportional to 321,257.70, 481,887.63 and 81,371.52

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Solution

The fourth proportional to 321,257.70, 481,887.63 and 81,371.52 is: 122,057.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,257.70 : 481,887.63 = 81,371.52 : x
  2. Step 2: Convert to fraction form
    321,257.70/481,887.63 = 81,371.52/x
  3. Step 3: Cross multiply
    321,257.70x = 481,887.63 × 81,371.52
  4. Step 4: Simplify right side
    321,257.70x = 39,211,928,922.30
  5. Step 5: Solve for x
    x = 39,211,928,922.30/321,257.70
  6. Step 6: Final answer
    x = 122,057.55

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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.