Home / 280,821.94-421,149.78-81,144.18

Finding the Fourth Proportional to 280,821.94, 421,149.78 and 81,144.18

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Solution

The fourth proportional to 280,821.94, 421,149.78 and 81,144.18 is: 121,692.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,821.94 : 421,149.78 = 81,144.18 : x
  2. Step 2: Convert to fraction form
    280,821.94/421,149.78 = 81,144.18/x
  3. Step 3: Cross multiply
    280,821.94x = 421,149.78 × 81,144.18
  4. Step 4: Simplify right side
    280,821.94x = 34,173,853,555.28
  5. Step 5: Solve for x
    x = 34,173,853,555.28/280,821.94
  6. Step 6: Final answer
    x = 121,692.25

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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.