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Finding the Fourth Proportional to 159,859.20, 239,983.20 and 80,932.80

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Solution

The fourth proportional to 159,859.20, 239,983.20 and 80,932.80 is: 121,497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,859.20 : 239,983.20 = 80,932.80 : x
  2. Step 2: Convert to fraction form
    159,859.20/239,983.20 = 80,932.80/x
  3. Step 3: Cross multiply
    159,859.20x = 239,983.20 × 80,932.80
  4. Step 4: Simplify right side
    159,859.20x = 19,422,512,328.96
  5. Step 5: Solve for x
    x = 19,422,512,328.96/159,859.20
  6. Step 6: Final answer
    x = 121,497.62

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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.