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Finding the Fourth Proportional to 122,687.71, 169,296.12 and 68,231.07

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Solution

The fourth proportional to 122,687.71, 169,296.12 and 68,231.07 is: 94,151.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,687.71 : 169,296.12 = 68,231.07 : x
  2. Step 2: Convert to fraction form
    122,687.71/169,296.12 = 68,231.07/x
  3. Step 3: Cross multiply
    122,687.71x = 169,296.12 × 68,231.07
  4. Step 4: Simplify right side
    122,687.71x = 11,551,255,414.45
  5. Step 5: Solve for x
    x = 11,551,255,414.45/122,687.71
  6. Step 6: Final answer
    x = 94,151.69

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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.