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Finding the Fourth Proportional to 120,248.89, 165,871.17 and 79,413.39

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Solution

The fourth proportional to 120,248.89, 165,871.17 and 79,413.39 is: 109,542.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,248.89 : 165,871.17 = 79,413.39 : x
  2. Step 2: Convert to fraction form
    120,248.89/165,871.17 = 79,413.39/x
  3. Step 3: Cross multiply
    120,248.89x = 165,871.17 × 79,413.39
  4. Step 4: Simplify right side
    120,248.89x = 13,172,391,912.97
  5. Step 5: Solve for x
    x = 13,172,391,912.97/120,248.89
  6. Step 6: Final answer
    x = 109,542.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.