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Finding the Fourth Proportional to 239,413.50, 330,391.62 and 131,981.16

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Solution

The fourth proportional to 239,413.50, 330,391.62 and 131,981.16 is: 182,134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,413.50 : 330,391.62 = 131,981.16 : x
  2. Step 2: Convert to fraction form
    239,413.50/330,391.62 = 131,981.16/x
  3. Step 3: Cross multiply
    239,413.50x = 330,391.62 × 131,981.16
  4. Step 4: Simplify right side
    239,413.50x = 43,605,469,261.88
  5. Step 5: Solve for x
    x = 43,605,469,261.88/239,413.50
  6. Step 6: Final answer
    x = 182,134.55

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1.5x scale

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.