Home / 260,835.76-391,309.80-80,917.54

Finding the Fourth Proportional to 260,835.76, 391,309.80 and 80,917.54

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Solution

The fourth proportional to 260,835.76, 391,309.80 and 80,917.54 is: 121,393.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,835.76 : 391,309.80 = 80,917.54 : x
  2. Step 2: Convert to fraction form
    260,835.76/391,309.80 = 80,917.54/x
  3. Step 3: Cross multiply
    260,835.76x = 391,309.80 × 80,917.54
  4. Step 4: Simplify right side
    260,835.76x = 31,663,826,393.89
  5. Step 5: Solve for x
    x = 31,663,826,393.89/260,835.76
  6. Step 6: Final answer
    x = 121,393.73

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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.