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Finding the Fourth Proportional to 159,940.20, 240,104.70 and 81,013.80

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Solution

The fourth proportional to 159,940.20, 240,104.70 and 81,013.80 is: 121,619.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,940.20 : 240,104.70 = 81,013.80 : x
  2. Step 2: Convert to fraction form
    159,940.20/240,104.70 = 81,013.80/x
  3. Step 3: Cross multiply
    159,940.20x = 240,104.70 × 81,013.80
  4. Step 4: Simplify right side
    159,940.20x = 19,451,794,144.86
  5. Step 5: Solve for x
    x = 19,451,794,144.86/159,940.20
  6. Step 6: Final answer
    x = 121,619.17

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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.