Home / 280,110.03-420,219.68-90,617.37

Finding the Fourth Proportional to 280,110.03, 420,219.68 and 90,617.37

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Solution

The fourth proportional to 280,110.03, 420,219.68 and 90,617.37 is: 135,943.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,110.03 : 420,219.68 = 90,617.37 : x
  2. Step 2: Convert to fraction form
    280,110.03/420,219.68 = 90,617.37/x
  3. Step 3: Cross multiply
    280,110.03x = 420,219.68 × 90,617.37
  4. Step 4: Simplify right side
    280,110.03x = 38,079,201,770.75
  5. Step 5: Solve for x
    x = 38,079,201,770.75/280,110.03
  6. Step 6: Final answer
    x = 135,943.73

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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.