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Finding the Fourth Proportional to 106,429,608.80, 159,644,413.20 and 80,920,440.80

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Solution

The fourth proportional to 106,429,608.80, 159,644,413.20 and 80,920,440.80 is: 121,380,661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,429,608.80 : 159,644,413.20 = 80,920,440.80 : x
  2. Step 2: Convert to fraction form
    106,429,608.80/159,644,413.20 = 80,920,440.80/x
  3. Step 3: Cross multiply
    106,429,608.80x = 159,644,413.20 × 80,920,440.80
  4. Step 4: Simplify right side
    106,429,608.80x = 12,918,496,287,401,338
  5. Step 5: Solve for x
    x = 12,918,496,287,401,338/106,429,608.80
  6. Step 6: Final answer
    x = 121,380,661.20

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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.