Home / 260,835.26-391,309.05-80,917.04

Finding the Fourth Proportional to 260,835.26, 391,309.05 and 80,917.04

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Solution

The fourth proportional to 260,835.26, 391,309.05 and 80,917.04 is: 121,392.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,835.26 : 391,309.05 = 80,917.04 : x
  2. Step 2: Convert to fraction form
    260,835.26/391,309.05 = 80,917.04/x
  3. Step 3: Cross multiply
    260,835.26x = 391,309.05 × 80,917.04
  4. Step 4: Simplify right side
    260,835.26x = 31,663,570,051.21
  5. Step 5: Solve for x
    x = 31,663,570,051.21/260,835.26
  6. Step 6: Final answer
    x = 121,392.98

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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.