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Finding the Fourth Proportional to 80,979,338.60, 121,469,007.90 and 80,979,338.60

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Solution

The fourth proportional to 80,979,338.60, 121,469,007.90 and 80,979,338.60 is: 121,469,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,979,338.60 : 121,469,007.90 = 80,979,338.60 : x
  2. Step 2: Convert to fraction form
    80,979,338.60/121,469,007.90 = 80,979,338.60/x
  3. Step 3: Cross multiply
    80,979,338.60x = 121,469,007.90 × 80,979,338.60
  4. Step 4: Simplify right side
    80,979,338.60x = 9,836,479,920,140,174
  5. Step 5: Solve for x
    x = 9,836,479,920,140,174/80,979,338.60
  6. Step 6: Final answer
    x = 121,469,007.90

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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.