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Finding the Fourth Proportional to 75,787,728.80, 113,469,016.80 and 73,661,964.80

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Solution

The fourth proportional to 75,787,728.80, 113,469,016.80 and 73,661,964.80 is: 110,286,333.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,787,728.80 : 113,469,016.80 = 73,661,964.80 : x
  2. Step 2: Convert to fraction form
    75,787,728.80/113,469,016.80 = 73,661,964.80/x
  3. Step 3: Cross multiply
    75,787,728.80x = 113,469,016.80 × 73,661,964.80
  4. Step 4: Simplify right side
    75,787,728.80x = 8,358,350,721,412,208
  5. Step 5: Solve for x
    x = 8,358,350,721,412,208/75,787,728.80
  6. Step 6: Final answer
    x = 110,286,333.34

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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.