Home / 280,861.39-420,919.49-122,917.87

Finding the Fourth Proportional to 280,861.39, 420,919.49 and 122,917.87

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Solution

The fourth proportional to 280,861.39, 420,919.49 and 122,917.87 is: 184,213.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,861.39 : 420,919.49 = 122,917.87 : x
  2. Step 2: Convert to fraction form
    280,861.39/420,919.49 = 122,917.87/x
  3. Step 3: Cross multiply
    280,861.39x = 420,919.49 × 122,917.87
  4. Step 4: Simplify right side
    280,861.39x = 51,738,526,537.70
  5. Step 5: Solve for x
    x = 51,738,526,537.70/280,861.39
  6. Step 6: Final answer
    x = 184,213.74

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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.