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Finding the Fourth Proportional to 159,755.20, 239,827.20 and 80,828.80

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Solution

The fourth proportional to 159,755.20, 239,827.20 and 80,828.80 is: 121,341.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,755.20 : 239,827.20 = 80,828.80 : x
  2. Step 2: Convert to fraction form
    159,755.20/239,827.20 = 80,828.80/x
  3. Step 3: Cross multiply
    159,755.20x = 239,827.20 × 80,828.80
  4. Step 4: Simplify right side
    159,755.20x = 19,384,944,783.36
  5. Step 5: Solve for x
    x = 19,384,944,783.36/159,755.20
  6. Step 6: Final answer
    x = 121,341.56

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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.