Home / 321,976.20-482,942.70-85,313.80

Finding the Fourth Proportional to 321,976.20, 482,942.70 and 85,313.80

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Solution

The fourth proportional to 321,976.20, 482,942.70 and 85,313.80 is: 127,964.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,976.20 : 482,942.70 = 85,313.80 : x
  2. Step 2: Convert to fraction form
    321,976.20/482,942.70 = 85,313.80/x
  3. Step 3: Cross multiply
    321,976.20x = 482,942.70 × 85,313.80
  4. Step 4: Simplify right side
    321,976.20x = 41,201,676,919.26
  5. Step 5: Solve for x
    x = 41,201,676,919.26/321,976.20
  6. Step 6: Final answer
    x = 127,964.98

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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.