Home / 260,820.78-391,257.68-90,020.26

Finding the Fourth Proportional to 260,820.78, 391,257.68 and 90,020.26

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Solution

The fourth proportional to 260,820.78, 391,257.68 and 90,020.26 is: 135,039.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,820.78 : 391,257.68 = 90,020.26 : x
  2. Step 2: Convert to fraction form
    260,820.78/391,257.68 = 90,020.26/x
  3. Step 3: Cross multiply
    260,820.78x = 391,257.68 × 90,020.26
  4. Step 4: Simplify right side
    260,820.78x = 35,221,118,080.60
  5. Step 5: Solve for x
    x = 35,221,118,080.60/260,820.78
  6. Step 6: Final answer
    x = 135,039.54

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1.5x scale

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.