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Finding the Fourth Proportional to 258,269.92, 387,413.62 and 68,730.47

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Solution

The fourth proportional to 258,269.92, 387,413.62 and 68,730.47 is: 103,098.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,269.92 : 387,413.62 = 68,730.47 : x
  2. Step 2: Convert to fraction form
    258,269.92/387,413.62 = 68,730.47/x
  3. Step 3: Cross multiply
    258,269.92x = 387,413.62 × 68,730.47
  4. Step 4: Simplify right side
    258,269.92x = 26,627,120,187.00
  5. Step 5: Solve for x
    x = 26,627,120,187.00/258,269.92
  6. Step 6: Final answer
    x = 103,098.03

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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.