Home / 260,836.76-391,311.30-80,918.54

Finding the Fourth Proportional to 260,836.76, 391,311.30 and 80,918.54

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Solution

The fourth proportional to 260,836.76, 391,311.30 and 80,918.54 is: 121,395.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,836.76 : 391,311.30 = 80,918.54 : x
  2. Step 2: Convert to fraction form
    260,836.76/391,311.30 = 80,918.54/x
  3. Step 3: Cross multiply
    260,836.76x = 391,311.30 × 80,918.54
  4. Step 4: Simplify right side
    260,836.76x = 31,664,339,081.50
  5. Step 5: Solve for x
    x = 31,664,339,081.50/260,836.76
  6. Step 6: Final answer
    x = 121,395.23

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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.