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Finding the Fourth Proportional to 172,942.20, 259,413.30 and 122,203.80

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Solution

The fourth proportional to 172,942.20, 259,413.30 and 122,203.80 is: 183,305.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,942.20 : 259,413.30 = 122,203.80 : x
  2. Step 2: Convert to fraction form
    172,942.20/259,413.30 = 122,203.80/x
  3. Step 3: Cross multiply
    172,942.20x = 259,413.30 × 122,203.80
  4. Step 4: Simplify right side
    172,942.20x = 31,701,291,030.54
  5. Step 5: Solve for x
    x = 31,701,291,030.54/172,942.20
  6. Step 6: Final answer
    x = 183,305.70

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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.