Home / 128,542.55-192,768.66-38,558.43

Finding the Fourth Proportional to 128,542.55, 192,768.66 and 38,558.43

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Solution

The fourth proportional to 128,542.55, 192,768.66 and 38,558.43 is: 57,824.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,542.55 : 192,768.66 = 38,558.43 : x
  2. Step 2: Convert to fraction form
    128,542.55/192,768.66 = 38,558.43/x
  3. Step 3: Cross multiply
    128,542.55x = 192,768.66 × 38,558.43
  4. Step 4: Simplify right side
    128,542.55x = 7,432,856,882.80
  5. Step 5: Solve for x
    x = 7,432,856,882.80/128,542.55
  6. Step 6: Final answer
    x = 57,824.10

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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.