Home / 260,974.42-391,319.17-78,578.62

Finding the Fourth Proportional to 260,974.42, 391,319.17 and 78,578.62

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Solution

The fourth proportional to 260,974.42, 391,319.17 and 78,578.62 is: 117,825.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,974.42 : 391,319.17 = 78,578.62 : x
  2. Step 2: Convert to fraction form
    260,974.42/391,319.17 = 78,578.62/x
  3. Step 3: Cross multiply
    260,974.42x = 391,319.17 × 78,578.62
  4. Step 4: Simplify right side
    260,974.42x = 30,749,319,183.40
  5. Step 5: Solve for x
    x = 30,749,319,183.40/260,974.42
  6. Step 6: Final answer
    x = 117,825.03

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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.