Home / 280,021.44-420,074.29-90,418.26

Finding the Fourth Proportional to 280,021.44, 420,074.29 and 90,418.26

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Solution

The fourth proportional to 280,021.44, 420,074.29 and 90,418.26 is: 135,640.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,021.44 : 420,074.29 = 90,418.26 : x
  2. Step 2: Convert to fraction form
    280,021.44/420,074.29 = 90,418.26/x
  3. Step 3: Cross multiply
    280,021.44x = 420,074.29 × 90,418.26
  4. Step 4: Simplify right side
    280,021.44x = 37,982,386,372.54
  5. Step 5: Solve for x
    x = 37,982,386,372.54/280,021.44
  6. Step 6: Final answer
    x = 135,640.99

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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.