Home / 80,771.30-121,147.38-21,611.54

Finding the Fourth Proportional to 80,771.30, 121,147.38 and 21,611.54

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Solution

The fourth proportional to 80,771.30, 121,147.38 and 21,611.54 is: 32,414.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,771.30 : 121,147.38 = 21,611.54 : x
  2. Step 2: Convert to fraction form
    80,771.30/121,147.38 = 21,611.54/x
  3. Step 3: Cross multiply
    80,771.30x = 121,147.38 × 21,611.54
  4. Step 4: Simplify right side
    80,771.30x = 2,618,181,448.77
  5. Step 5: Solve for x
    x = 2,618,181,448.77/80,771.30
  6. Step 6: Final answer
    x = 32,414.75

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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.