Home / 186,739.20-280,144.80-80,121.60

Finding the Fourth Proportional to 186,739.20, 280,144.80 and 80,121.60

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Solution

The fourth proportional to 186,739.20, 280,144.80 and 80,121.60 is: 120,197.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,739.20 : 280,144.80 = 80,121.60 : x
  2. Step 2: Convert to fraction form
    186,739.20/280,144.80 = 80,121.60/x
  3. Step 3: Cross multiply
    186,739.20x = 280,144.80 × 80,121.60
  4. Step 4: Simplify right side
    186,739.20x = 22,445,649,607.68
  5. Step 5: Solve for x
    x = 22,445,649,607.68/186,739.20
  6. Step 6: Final answer
    x = 120,197.85

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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.