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Finding the Fourth Proportional to 122,186.97, 168,611.06 and 71,208

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Solution

The fourth proportional to 122,186.97, 168,611.06 and 71,208 is: 98,262.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,186.97 : 168,611.06 = 71,208 : x
  2. Step 2: Convert to fraction form
    122,186.97/168,611.06 = 71,208/x
  3. Step 3: Cross multiply
    122,186.97x = 168,611.06 × 71,208
  4. Step 4: Simplify right side
    122,186.97x = 12,006,456,004.44
  5. Step 5: Solve for x
    x = 12,006,456,004.44/122,186.97
  6. Step 6: Final answer
    x = 98,262.98

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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.