Home / 261,278.82-391,918.83-71,741.79

Finding the Fourth Proportional to 261,278.82, 391,918.83 and 71,741.79

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Solution

The fourth proportional to 261,278.82, 391,918.83 and 71,741.79 is: 107,612.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,278.82 : 391,918.83 = 71,741.79 : x
  2. Step 2: Convert to fraction form
    261,278.82/391,918.83 = 71,741.79/x
  3. Step 3: Cross multiply
    261,278.82x = 391,918.83 × 71,741.79
  4. Step 4: Simplify right side
    261,278.82x = 28,116,958,398.91
  5. Step 5: Solve for x
    x = 28,116,958,398.91/261,278.82
  6. Step 6: Final answer
    x = 107,612.85

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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.