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Finding the Fourth Proportional to 279,249.69, 418,879.15 and 135,071.71

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Solution

The fourth proportional to 279,249.69, 418,879.15 and 135,071.71 is: 202,609.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,249.69 : 418,879.15 = 135,071.71 : x
  2. Step 2: Convert to fraction form
    279,249.69/418,879.15 = 135,071.71/x
  3. Step 3: Cross multiply
    279,249.69x = 418,879.15 × 135,071.71
  4. Step 4: Simplify right side
    279,249.69x = 56,578,723,073.85
  5. Step 5: Solve for x
    x = 56,578,723,073.85/279,249.69
  6. Step 6: Final answer
    x = 202,609.80

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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.