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Finding the Fourth Proportional to 73,212.20, 109,808.52 and 20,625.78

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Solution

The fourth proportional to 73,212.20, 109,808.52 and 20,625.78 is: 30,935.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,212.20 : 109,808.52 = 20,625.78 : x
  2. Step 2: Convert to fraction form
    73,212.20/109,808.52 = 20,625.78/x
  3. Step 3: Cross multiply
    73,212.20x = 109,808.52 × 20,625.78
  4. Step 4: Simplify right side
    73,212.20x = 2,264,886,375.65
  5. Step 5: Solve for x
    x = 2,264,886,375.65/73,212.20
  6. Step 6: Final answer
    x = 30,935.91

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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.