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Finding the Fourth Proportional to 66,413.92, 91,651.20 and 36,605.92

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Solution

The fourth proportional to 66,413.92, 91,651.20 and 36,605.92 is: 50,516.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,413.92 : 91,651.20 = 36,605.92 : x
  2. Step 2: Convert to fraction form
    66,413.92/91,651.20 = 36,605.92/x
  3. Step 3: Cross multiply
    66,413.92x = 91,651.20 × 36,605.92
  4. Step 4: Simplify right side
    66,413.92x = 3,354,976,495.10
  5. Step 5: Solve for x
    x = 3,354,976,495.10/66,413.92
  6. Step 6: Final answer
    x = 50,516.16

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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.