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Finding the Fourth Proportional to 89,791.28, 123,906.30 and 49,502.78

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Solution

The fourth proportional to 89,791.28, 123,906.30 and 49,502.78 is: 68,310.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,791.28 : 123,906.30 = 49,502.78 : x
  2. Step 2: Convert to fraction form
    89,791.28/123,906.30 = 49,502.78/x
  3. Step 3: Cross multiply
    89,791.28x = 123,906.30 × 49,502.78
  4. Step 4: Simplify right side
    89,791.28x = 6,133,706,309.51
  5. Step 5: Solve for x
    x = 6,133,706,309.51/89,791.28
  6. Step 6: Final answer
    x = 68,310.71

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1.5x scale

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.