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Finding the Fourth Proportional to 121,806.04, 168,091.84 and 68,091

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Solution

The fourth proportional to 121,806.04, 168,091.84 and 68,091 is: 93,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,806.04 : 168,091.84 = 68,091 : x
  2. Step 2: Convert to fraction form
    121,806.04/168,091.84 = 68,091/x
  3. Step 3: Cross multiply
    121,806.04x = 168,091.84 × 68,091
  4. Step 4: Simplify right side
    121,806.04x = 11,445,541,477.44
  5. Step 5: Solve for x
    x = 11,445,541,477.44/121,806.04
  6. Step 6: Final answer
    x = 93,965.30

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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.