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Finding the Fourth Proportional to 172,632.80, 258,511.80 and 137,640.80

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Solution

The fourth proportional to 172,632.80, 258,511.80 and 137,640.80 is: 206,112.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,632.80 : 258,511.80 = 137,640.80 : x
  2. Step 2: Convert to fraction form
    172,632.80/258,511.80 = 137,640.80/x
  3. Step 3: Cross multiply
    172,632.80x = 258,511.80 × 137,640.80
  4. Step 4: Simplify right side
    172,632.80x = 35,581,770,961.44
  5. Step 5: Solve for x
    x = 35,581,770,961.44/172,632.80
  6. Step 6: Final answer
    x = 206,112.46

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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.