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Finding the Fourth Proportional to 279,433.11, 418,914.54 and 121,542.66

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Solution

The fourth proportional to 279,433.11, 418,914.54 and 121,542.66 is: 182,211.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,433.11 : 418,914.54 = 121,542.66 : x
  2. Step 2: Convert to fraction form
    279,433.11/418,914.54 = 121,542.66/x
  3. Step 3: Cross multiply
    279,433.11x = 418,914.54 × 121,542.66
  4. Step 4: Simplify right side
    279,433.11x = 50,915,987,504.28
  5. Step 5: Solve for x
    x = 50,915,987,504.28/279,433.11
  6. Step 6: Final answer
    x = 182,211.72

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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.