Home / 80,760.52-121,131.24-21,600.78

Finding the Fourth Proportional to 80,760.52, 121,131.24 and 21,600.78

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Solution

The fourth proportional to 80,760.52, 121,131.24 and 21,600.78 is: 32,398.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,760.52 : 121,131.24 = 21,600.78 : x
  2. Step 2: Convert to fraction form
    80,760.52/121,131.24 = 21,600.78/x
  3. Step 3: Cross multiply
    80,760.52x = 121,131.24 × 21,600.78
  4. Step 4: Simplify right side
    80,760.52x = 2,616,529,266.37
  5. Step 5: Solve for x
    x = 2,616,529,266.37/80,760.52
  6. Step 6: Final answer
    x = 32,398.62

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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.