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Finding the Fourth Proportional to 172,990.60, 259,680.30 and 133,721.80

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Solution

The fourth proportional to 172,990.60, 259,680.30 and 133,721.80 is: 200,732.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,990.60 : 259,680.30 = 133,721.80 : x
  2. Step 2: Convert to fraction form
    172,990.60/259,680.30 = 133,721.80/x
  3. Step 3: Cross multiply
    172,990.60x = 259,680.30 × 133,721.80
  4. Step 4: Simplify right side
    172,990.60x = 34,724,917,140.54
  5. Step 5: Solve for x
    x = 34,724,917,140.54/172,990.60
  6. Step 6: Final answer
    x = 200,732.97

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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.