Home / 128,083.24-192,124.56-71,193.30

Finding the Fourth Proportional to 128,083.24, 192,124.56 and 71,193.30

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Solution

The fourth proportional to 128,083.24, 192,124.56 and 71,193.30 is: 106,789.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,083.24 : 192,124.56 = 71,193.30 : x
  2. Step 2: Convert to fraction form
    128,083.24/192,124.56 = 71,193.30/x
  3. Step 3: Cross multiply
    128,083.24x = 192,124.56 × 71,193.30
  4. Step 4: Simplify right side
    128,083.24x = 13,677,981,437.45
  5. Step 5: Solve for x
    x = 13,677,981,437.45/128,083.24
  6. Step 6: Final answer
    x = 106,789.78

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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.