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Finding the Fourth Proportional to 80,919,770.80, 121,379,656.20 and 80,919,770.80

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Solution

The fourth proportional to 80,919,770.80, 121,379,656.20 and 80,919,770.80 is: 121,379,656.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,919,770.80 : 121,379,656.20 = 80,919,770.80 : x
  2. Step 2: Convert to fraction form
    80,919,770.80/121,379,656.20 = 80,919,770.80/x
  3. Step 3: Cross multiply
    80,919,770.80x = 121,379,656.20 × 80,919,770.80
  4. Step 4: Simplify right side
    80,919,770.80x = 9,822,013,959,486,798
  5. Step 5: Solve for x
    x = 9,822,013,959,486,798/80,919,770.80
  6. Step 6: Final answer
    x = 121,379,656.20

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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.