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Finding the Fourth Proportional to 69,540, 103,415.43 and 67,325.73

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Solution

The fourth proportional to 69,540, 103,415.43 and 67,325.73 is: 100,122.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,540 : 103,415.43 = 67,325.73 : x
  2. Step 2: Convert to fraction form
    69,540/103,415.43 = 67,325.73/x
  3. Step 3: Cross multiply
    69,540x = 103,415.43 × 67,325.73
  4. Step 4: Simplify right side
    69,540x = 6,962,519,318.01
  5. Step 5: Solve for x
    x = 6,962,519,318.01/69,540
  6. Step 6: Final answer
    x = 100,122.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.