Home / 261,336.21-391,910.19-90,511.67

Finding the Fourth Proportional to 261,336.21, 391,910.19 and 90,511.67

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Solution

The fourth proportional to 261,336.21, 391,910.19 and 90,511.67 is: 135,734.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,336.21 : 391,910.19 = 90,511.67 : x
  2. Step 2: Convert to fraction form
    261,336.21/391,910.19 = 90,511.67/x
  3. Step 3: Cross multiply
    261,336.21x = 391,910.19 × 90,511.67
  4. Step 4: Simplify right side
    261,336.21x = 35,472,445,786.92
  5. Step 5: Solve for x
    x = 35,472,445,786.92/261,336.21
  6. Step 6: Final answer
    x = 135,734.91

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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.