Home / 280,109.03-420,218.18-90,616.37

Finding the Fourth Proportional to 280,109.03, 420,218.18 and 90,616.37

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Solution

The fourth proportional to 280,109.03, 420,218.18 and 90,616.37 is: 135,942.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,109.03 : 420,218.18 = 90,616.37 : x
  2. Step 2: Convert to fraction form
    280,109.03/420,218.18 = 90,616.37/x
  3. Step 3: Cross multiply
    280,109.03x = 420,218.18 × 90,616.37
  4. Step 4: Simplify right side
    280,109.03x = 38,078,646,079.61
  5. Step 5: Solve for x
    x = 38,078,646,079.61/280,109.03
  6. Step 6: Final answer
    x = 135,942.23

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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.