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Finding the Fourth Proportional to 123,863.65, 170,921.39 and 68,674.43

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Solution

The fourth proportional to 123,863.65, 170,921.39 and 68,674.43 is: 94,764.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,863.65 : 170,921.39 = 68,674.43 : x
  2. Step 2: Convert to fraction form
    123,863.65/170,921.39 = 68,674.43/x
  3. Step 3: Cross multiply
    123,863.65x = 170,921.39 × 68,674.43
  4. Step 4: Simplify right side
    123,863.65x = 11,737,929,116.99
  5. Step 5: Solve for x
    x = 11,737,929,116.99/123,863.65
  6. Step 6: Final answer
    x = 94,764.92

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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.