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Finding the Fourth Proportional to 74,620.61, 102,943.17 and 50,413.79

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Solution

The fourth proportional to 74,620.61, 102,943.17 and 50,413.79 is: 69,548.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,620.61 : 102,943.17 = 50,413.79 : x
  2. Step 2: Convert to fraction form
    74,620.61/102,943.17 = 50,413.79/x
  3. Step 3: Cross multiply
    74,620.61x = 102,943.17 × 50,413.79
  4. Step 4: Simplify right side
    74,620.61x = 5,189,755,611.67
  5. Step 5: Solve for x
    x = 5,189,755,611.67/74,620.61
  6. Step 6: Final answer
    x = 69,548.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.