Home / 128,621.92-192,960.24-39,877.60

Finding the Fourth Proportional to 128,621.92, 192,960.24 and 39,877.60

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Solution

The fourth proportional to 128,621.92, 192,960.24 and 39,877.60 is: 59,824.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,621.92 : 192,960.24 = 39,877.60 : x
  2. Step 2: Convert to fraction form
    128,621.92/192,960.24 = 39,877.60/x
  3. Step 3: Cross multiply
    128,621.92x = 192,960.24 × 39,877.60
  4. Step 4: Simplify right side
    128,621.92x = 7,694,791,266.62
  5. Step 5: Solve for x
    x = 7,694,791,266.62/128,621.92
  6. Step 6: Final answer
    x = 59,824.88

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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.