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Finding the Fourth Proportional to 71,695.20, 107,413.20 and 61,327.20

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Solution

The fourth proportional to 71,695.20, 107,413.20 and 61,327.20 is: 91,879.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,695.20 : 107,413.20 = 61,327.20 : x
  2. Step 2: Convert to fraction form
    71,695.20/107,413.20 = 61,327.20/x
  3. Step 3: Cross multiply
    71,695.20x = 107,413.20 × 61,327.20
  4. Step 4: Simplify right side
    71,695.20x = 6,587,350,799.04
  5. Step 5: Solve for x
    x = 6,587,350,799.04/71,695.20
  6. Step 6: Final answer
    x = 91,879.94

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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.