Home / 321,972.20-482,936.70-85,309.80

Finding the Fourth Proportional to 321,972.20, 482,936.70 and 85,309.80

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Solution

The fourth proportional to 321,972.20, 482,936.70 and 85,309.80 is: 127,958.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,972.20 : 482,936.70 = 85,309.80 : x
  2. Step 2: Convert to fraction form
    321,972.20/482,936.70 = 85,309.80/x
  3. Step 3: Cross multiply
    321,972.20x = 482,936.70 × 85,309.80
  4. Step 4: Simplify right side
    321,972.20x = 41,199,233,289.66
  5. Step 5: Solve for x
    x = 41,199,233,289.66/321,972.20
  6. Step 6: Final answer
    x = 127,958.98

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1.5x scale

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.