Home / 258,728,128.20-388,098,413.10-76,981,235.40

Finding the Fourth Proportional to 258,728,128.20, 388,098,413.10 and 76,981,235.40

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Solution

The fourth proportional to 258,728,128.20, 388,098,413.10 and 76,981,235.40 is: 115,473,704.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,728,128.20 : 388,098,413.10 = 76,981,235.40 : x
  2. Step 2: Convert to fraction form
    258,728,128.20/388,098,413.10 = 76,981,235.40/x
  3. Step 3: Cross multiply
    258,728,128.20x = 388,098,413.10 × 76,981,235.40
  4. Step 4: Simplify right side
    258,728,128.20x = 29,876,295,297,217,548
  5. Step 5: Solve for x
    x = 29,876,295,297,217,548/258,728,128.20
  6. Step 6: Final answer
    x = 115,473,704.02

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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.