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Finding the Fourth Proportional to 68,413.40, 102,619.39 and 21,666.27

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Solution

The fourth proportional to 68,413.40, 102,619.39 and 21,666.27 is: 32,499.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,413.40 : 102,619.39 = 21,666.27 : x
  2. Step 2: Convert to fraction form
    68,413.40/102,619.39 = 21,666.27/x
  3. Step 3: Cross multiply
    68,413.40x = 102,619.39 × 21,666.27
  4. Step 4: Simplify right side
    68,413.40x = 2,223,379,410.98
  5. Step 5: Solve for x
    x = 2,223,379,410.98/68,413.40
  6. Step 6: Final answer
    x = 32,499.18

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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.