Home / 138,398,413.20-207,455,902.20-80,861,067.60

Finding the Fourth Proportional to 138,398,413.20, 207,455,902.20 and 80,861,067.60

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Solution

The fourth proportional to 138,398,413.20, 207,455,902.20 and 80,861,067.60 is: 121,208,801.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398,413.20 : 207,455,902.20 = 80,861,067.60 : x
  2. Step 2: Convert to fraction form
    138,398,413.20/207,455,902.20 = 80,861,067.60/x
  3. Step 3: Cross multiply
    138,398,413.20x = 207,455,902.20 × 80,861,067.60
  4. Step 4: Simplify right side
    138,398,413.20x = 16,775,105,731,813,186
  5. Step 5: Solve for x
    x = 16,775,105,731,813,186/138,398,413.20
  6. Step 6: Final answer
    x = 121,208,801.05

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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.