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Finding the Fourth Proportional to 326,620.22, 489,930.14 and 101,999.90

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Solution

The fourth proportional to 326,620.22, 489,930.14 and 101,999.90 is: 152,999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,620.22 : 489,930.14 = 101,999.90 : x
  2. Step 2: Convert to fraction form
    326,620.22/489,930.14 = 101,999.90/x
  3. Step 3: Cross multiply
    326,620.22x = 489,930.14 × 101,999.90
  4. Step 4: Simplify right side
    326,620.22x = 49,972,822,327.34
  5. Step 5: Solve for x
    x = 49,972,822,327.34/326,620.22
  6. Step 6: Final answer
    x = 152,999.78

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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.