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Finding the Fourth Proportional to 71,999.10, 107,998.65 and 19,413.90

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Solution

The fourth proportional to 71,999.10, 107,998.65 and 19,413.90 is: 29,120.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,999.10 : 107,998.65 = 19,413.90 : x
  2. Step 2: Convert to fraction form
    71,999.10/107,998.65 = 19,413.90/x
  3. Step 3: Cross multiply
    71,999.10x = 107,998.65 × 19,413.90
  4. Step 4: Simplify right side
    71,999.10x = 2,096,674,991.24
  5. Step 5: Solve for x
    x = 2,096,674,991.24/71,999.10
  6. Step 6: Final answer
    x = 29,120.85

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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.