Home / 280,129.20-419,843.40-139,926.96

Finding the Fourth Proportional to 280,129.20, 419,843.40 and 139,926.96

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Solution

The fourth proportional to 280,129.20, 419,843.40 and 139,926.96 is: 209,715.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,129.20 : 419,843.40 = 139,926.96 : x
  2. Step 2: Convert to fraction form
    280,129.20/419,843.40 = 139,926.96/x
  3. Step 3: Cross multiply
    280,129.20x = 419,843.40 × 139,926.96
  4. Step 4: Simplify right side
    280,129.20x = 58,747,410,638.06
  5. Step 5: Solve for x
    x = 58,747,410,638.06/280,129.20
  6. Step 6: Final answer
    x = 209,715.41

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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.