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Finding the Fourth Proportional to 49,179.88, 73,769.84 and 21,081.68

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Solution

The fourth proportional to 49,179.88, 73,769.84 and 21,081.68 is: 31,622.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,179.88 : 73,769.84 = 21,081.68 : x
  2. Step 2: Convert to fraction form
    49,179.88/73,769.84 = 21,081.68/x
  3. Step 3: Cross multiply
    49,179.88x = 73,769.84 × 21,081.68
  4. Step 4: Simplify right side
    49,179.88x = 1,555,192,160.53
  5. Step 5: Solve for x
    x = 1,555,192,160.53/49,179.88
  6. Step 6: Final answer
    x = 31,622.53

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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.