Home / 321,578.10-482,021.55-121,821.30

Finding the Fourth Proportional to 321,578.10, 482,021.55 and 121,821.30

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Solution

The fourth proportional to 321,578.10, 482,021.55 and 121,821.30 is: 182,601.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,578.10 : 482,021.55 = 121,821.30 : x
  2. Step 2: Convert to fraction form
    321,578.10/482,021.55 = 121,821.30/x
  3. Step 3: Cross multiply
    321,578.10x = 482,021.55 × 121,821.30
  4. Step 4: Simplify right side
    321,578.10x = 58,720,491,849.02
  5. Step 5: Solve for x
    x = 58,720,491,849.02/321,578.10
  6. Step 6: Final answer
    x = 182,601.03

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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.