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Finding the Fourth Proportional to 122,405.97, 168,921.41 and 71,450.49

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Solution

The fourth proportional to 122,405.97, 168,921.41 and 71,450.49 is: 98,602.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,405.97 : 168,921.41 = 71,450.49 : x
  2. Step 2: Convert to fraction form
    122,405.97/168,921.41 = 71,450.49/x
  3. Step 3: Cross multiply
    122,405.97x = 168,921.41 × 71,450.49
  4. Step 4: Simplify right side
    122,405.97x = 12,069,517,158.74
  5. Step 5: Solve for x
    x = 12,069,517,158.74/122,405.97
  6. Step 6: Final answer
    x = 98,602.36

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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.