Home / 321,100.20-481,648.68-81,214.11

Finding the Fourth Proportional to 321,100.20, 481,648.68 and 81,214.11

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Solution

The fourth proportional to 321,100.20, 481,648.68 and 81,214.11 is: 121,820.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,100.20 : 481,648.68 = 81,214.11 : x
  2. Step 2: Convert to fraction form
    321,100.20/481,648.68 = 81,214.11/x
  3. Step 3: Cross multiply
    321,100.20x = 481,648.68 × 81,214.11
  4. Step 4: Simplify right side
    321,100.20x = 39,116,668,878.87
  5. Step 5: Solve for x
    x = 39,116,668,878.87/321,100.20
  6. Step 6: Final answer
    x = 121,820.76

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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.