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Finding the Fourth Proportional to 120,901.20, 181,524.60 and 68,413.20

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Solution

The fourth proportional to 120,901.20, 181,524.60 and 68,413.20 is: 102,717.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,901.20 : 181,524.60 = 68,413.20 : x
  2. Step 2: Convert to fraction form
    120,901.20/181,524.60 = 68,413.20/x
  3. Step 3: Cross multiply
    120,901.20x = 181,524.60 × 68,413.20
  4. Step 4: Simplify right side
    120,901.20x = 12,418,678,764.72
  5. Step 5: Solve for x
    x = 12,418,678,764.72/120,901.20
  6. Step 6: Final answer
    x = 102,717.58

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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.