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Finding the Fourth Proportional to 123,120.43, 169,895.99 and 69,418.64

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Solution

The fourth proportional to 123,120.43, 169,895.99 and 69,418.64 is: 95,791.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,120.43 : 169,895.99 = 69,418.64 : x
  2. Step 2: Convert to fraction form
    123,120.43/169,895.99 = 69,418.64/x
  3. Step 3: Cross multiply
    123,120.43x = 169,895.99 × 69,418.64
  4. Step 4: Simplify right side
    123,120.43x = 11,793,949,165.54
  5. Step 5: Solve for x
    x = 11,793,949,165.54/123,120.43
  6. Step 6: Final answer
    x = 95,791.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.