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Finding the Fourth Proportional to 73,212.70, 109,940.51 and 45,685.66

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Solution

The fourth proportional to 73,212.70, 109,940.51 and 45,685.66 is: 68,604.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,212.70 : 109,940.51 = 45,685.66 : x
  2. Step 2: Convert to fraction form
    73,212.70/109,940.51 = 45,685.66/x
  3. Step 3: Cross multiply
    73,212.70x = 109,940.51 × 45,685.66
  4. Step 4: Simplify right side
    73,212.70x = 5,022,704,760.09
  5. Step 5: Solve for x
    x = 5,022,704,760.09/73,212.70
  6. Step 6: Final answer
    x = 68,604.28

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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.