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Finding the Fourth Proportional to 81,377.91, 122,129.37 and 36,413.19

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Solution

The fourth proportional to 81,377.91, 122,129.37 and 36,413.19 is: 54,647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,377.91 : 122,129.37 = 36,413.19 : x
  2. Step 2: Convert to fraction form
    81,377.91/122,129.37 = 36,413.19/x
  3. Step 3: Cross multiply
    81,377.91x = 122,129.37 × 36,413.19
  4. Step 4: Simplify right side
    81,377.91x = 4,447,119,954.39
  5. Step 5: Solve for x
    x = 4,447,119,954.39/81,377.91
  6. Step 6: Final answer
    x = 54,647.75

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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.