Home / 321,280.05-481,943.70-84,621

Finding the Fourth Proportional to 321,280.05, 481,943.70 and 84,621

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Solution

The fourth proportional to 321,280.05, 481,943.70 and 84,621 is: 126,937.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,280.05 : 481,943.70 = 84,621 : x
  2. Step 2: Convert to fraction form
    321,280.05/481,943.70 = 84,621/x
  3. Step 3: Cross multiply
    321,280.05x = 481,943.70 × 84,621
  4. Step 4: Simplify right side
    321,280.05x = 40,782,557,837.70
  5. Step 5: Solve for x
    x = 40,782,557,837.70/321,280.05
  6. Step 6: Final answer
    x = 126,937.72

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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.