Home / 261,212.16-391,874.62-81,294.05

Finding the Fourth Proportional to 261,212.16, 391,874.62 and 81,294.05

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Solution

The fourth proportional to 261,212.16, 391,874.62 and 81,294.05 is: 121,958.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,212.16 : 391,874.62 = 81,294.05 : x
  2. Step 2: Convert to fraction form
    261,212.16/391,874.62 = 81,294.05/x
  3. Step 3: Cross multiply
    261,212.16x = 391,874.62 × 81,294.05
  4. Step 4: Simplify right side
    261,212.16x = 31,857,072,789.40
  5. Step 5: Solve for x
    x = 31,857,072,789.40/261,212.16
  6. Step 6: Final answer
    x = 121,958.61

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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.