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Finding the Fourth Proportional to 122,659.09, 169,271.13 and 68,940.97

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Solution

The fourth proportional to 122,659.09, 169,271.13 and 68,940.97 is: 95,139.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,659.09 : 169,271.13 = 68,940.97 : x
  2. Step 2: Convert to fraction form
    122,659.09/169,271.13 = 68,940.97/x
  3. Step 3: Cross multiply
    122,659.09x = 169,271.13 × 68,940.97
  4. Step 4: Simplify right side
    122,659.09x = 11,669,715,895.20
  5. Step 5: Solve for x
    x = 11,669,715,895.20/122,659.09
  6. Step 6: Final answer
    x = 95,139.43

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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.