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Finding the Fourth Proportional to 225,390.62, 338,142.09 and 67,621.98

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Solution

The fourth proportional to 225,390.62, 338,142.09 and 67,621.98 is: 101,449.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,390.62 : 338,142.09 = 67,621.98 : x
  2. Step 2: Convert to fraction form
    225,390.62/338,142.09 = 67,621.98/x
  3. Step 3: Cross multiply
    225,390.62x = 338,142.09 × 67,621.98
  4. Step 4: Simplify right side
    225,390.62x = 22,865,837,647.14
  5. Step 5: Solve for x
    x = 22,865,837,647.14/225,390.62
  6. Step 6: Final answer
    x = 101,449.82

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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.