Home / 420,039.20-630,180.84-135,723.80

Finding the Fourth Proportional to 420,039.20, 630,180.84 and 135,723.80

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Solution

The fourth proportional to 420,039.20, 630,180.84 and 135,723.80 is: 203,625.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,039.20 : 630,180.84 = 135,723.80 : x
  2. Step 2: Convert to fraction form
    420,039.20/630,180.84 = 135,723.80/x
  3. Step 3: Cross multiply
    420,039.20x = 630,180.84 × 135,723.80
  4. Step 4: Simplify right side
    420,039.20x = 85,530,538,291.99
  5. Step 5: Solve for x
    x = 85,530,538,291.99/420,039.20
  6. Step 6: Final answer
    x = 203,625.13

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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.