Home / 128,520.73-192,788.65-49,635.37

Finding the Fourth Proportional to 128,520.73, 192,788.65 and 49,635.37

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Solution

The fourth proportional to 128,520.73, 192,788.65 and 49,635.37 is: 74,455.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,520.73 : 192,788.65 = 49,635.37 : x
  2. Step 2: Convert to fraction form
    128,520.73/192,788.65 = 49,635.37/x
  3. Step 3: Cross multiply
    128,520.73x = 192,788.65 × 49,635.37
  4. Step 4: Simplify right side
    128,520.73x = 9,569,135,974.55
  5. Step 5: Solve for x
    x = 9,569,135,974.55/128,520.73
  6. Step 6: Final answer
    x = 74,455.97

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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.