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Finding the Fourth Proportional to 122,399.46, 168,910.80 and 68,684.37

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Solution

The fourth proportional to 122,399.46, 168,910.80 and 68,684.37 is: 94,784.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,399.46 : 168,910.80 = 68,684.37 : x
  2. Step 2: Convert to fraction form
    122,399.46/168,910.80 = 68,684.37/x
  3. Step 3: Cross multiply
    122,399.46x = 168,910.80 × 68,684.37
  4. Step 4: Simplify right side
    122,399.46x = 11,601,531,884.20
  5. Step 5: Solve for x
    x = 11,601,531,884.20/122,399.46
  6. Step 6: Final answer
    x = 94,784.18

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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.