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Finding the Fourth Proportional to 121,891.32, 168,225.60 and 68,179.32

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Solution

The fourth proportional to 121,891.32, 168,225.60 and 68,179.32 is: 94,096.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,891.32 : 168,225.60 = 68,179.32 : x
  2. Step 2: Convert to fraction form
    121,891.32/168,225.60 = 68,179.32/x
  3. Step 3: Cross multiply
    121,891.32x = 168,225.60 × 68,179.32
  4. Step 4: Simplify right side
    121,891.32x = 11,469,507,014.59
  5. Step 5: Solve for x
    x = 11,469,507,014.59/121,891.32
  6. Step 6: Final answer
    x = 94,096.18

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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.