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Finding the Fourth Proportional to 80,661,837.90, 120,992,756.85 and 80,661,837.90

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Solution

The fourth proportional to 80,661,837.90, 120,992,756.85 and 80,661,837.90 is: 120,992,756.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,661,837.90 : 120,992,756.85 = 80,661,837.90 : x
  2. Step 2: Convert to fraction form
    80,661,837.90/120,992,756.85 = 80,661,837.90/x
  3. Step 3: Cross multiply
    80,661,837.90x = 120,992,756.85 × 80,661,837.90
  4. Step 4: Simplify right side
    80,661,837.90x = 9,759,498,140,108,814
  5. Step 5: Solve for x
    x = 9,759,498,140,108,814/80,661,837.90
  6. Step 6: Final answer
    x = 120,992,756.85

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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.