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Finding the Fourth Proportional to 80,979,338.10, 121,469,007.15 and 80,979,338.10

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Solution

The fourth proportional to 80,979,338.10, 121,469,007.15 and 80,979,338.10 is: 121,469,007.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,979,338.10 : 121,469,007.15 = 80,979,338.10 : x
  2. Step 2: Convert to fraction form
    80,979,338.10/121,469,007.15 = 80,979,338.10/x
  3. Step 3: Cross multiply
    80,979,338.10x = 121,469,007.15 × 80,979,338.10
  4. Step 4: Simplify right side
    80,979,338.10x = 9,836,479,798,671,168
  5. Step 5: Solve for x
    x = 9,836,479,798,671,168/80,979,338.10
  6. Step 6: Final answer
    x = 121,469,007.15

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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.