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Finding the Fourth Proportional to 72,999.44, 109,493.70 and 20,413.04

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Solution

The fourth proportional to 72,999.44, 109,493.70 and 20,413.04 is: 30,618.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,999.44 : 109,493.70 = 20,413.04 : x
  2. Step 2: Convert to fraction form
    72,999.44/109,493.70 = 20,413.04/x
  3. Step 3: Cross multiply
    72,999.44x = 109,493.70 × 20,413.04
  4. Step 4: Simplify right side
    72,999.44x = 2,235,099,277.85
  5. Step 5: Solve for x
    x = 2,235,099,277.85/72,999.44
  6. Step 6: Final answer
    x = 30,618.03

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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.