Home / 280,979.68-421,469.04-131,169.76

Finding the Fourth Proportional to 280,979.68, 421,469.04 and 131,169.76

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Solution

The fourth proportional to 280,979.68, 421,469.04 and 131,169.76 is: 196,754.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,979.68 : 421,469.04 = 131,169.76 : x
  2. Step 2: Convert to fraction form
    280,979.68/421,469.04 = 131,169.76/x
  3. Step 3: Cross multiply
    280,979.68x = 421,469.04 × 131,169.76
  4. Step 4: Simplify right side
    280,979.68x = 55,283,992,824.23
  5. Step 5: Solve for x
    x = 55,283,992,824.23/280,979.68
  6. Step 6: Final answer
    x = 196,754.42

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1.5x scale

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.