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Finding the Fourth Proportional to 68,940.64, 103,413.20 and 19,024.48

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Solution

The fourth proportional to 68,940.64, 103,413.20 and 19,024.48 is: 28,537.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,940.64 : 103,413.20 = 19,024.48 : x
  2. Step 2: Convert to fraction form
    68,940.64/103,413.20 = 19,024.48/x
  3. Step 3: Cross multiply
    68,940.64x = 103,413.20 × 19,024.48
  4. Step 4: Simplify right side
    68,940.64x = 1,967,382,355.14
  5. Step 5: Solve for x
    x = 1,967,382,355.14/68,940.64
  6. Step 6: Final answer
    x = 28,537.34

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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.