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Finding the Fourth Proportional to 271,940.82, 407,869.11 and 138,919.38

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Solution

The fourth proportional to 271,940.82, 407,869.11 and 138,919.38 is: 208,357.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,940.82 : 407,869.11 = 138,919.38 : x
  2. Step 2: Convert to fraction form
    271,940.82/407,869.11 = 138,919.38/x
  3. Step 3: Cross multiply
    271,940.82x = 407,869.11 × 138,919.38
  4. Step 4: Simplify right side
    271,940.82x = 56,660,923,882.35
  5. Step 5: Solve for x
    x = 56,660,923,882.35/271,940.82
  6. Step 6: Final answer
    x = 208,357.55

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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.