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Finding the Fourth Proportional to 121,906.59, 168,238.52 and 68,195.22

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Solution

The fourth proportional to 121,906.59, 168,238.52 and 68,195.22 is: 94,113.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,906.59 : 168,238.52 = 68,195.22 : x
  2. Step 2: Convert to fraction form
    121,906.59/168,238.52 = 68,195.22/x
  3. Step 3: Cross multiply
    121,906.59x = 168,238.52 × 68,195.22
  4. Step 4: Simplify right side
    121,906.59x = 11,473,062,883.87
  5. Step 5: Solve for x
    x = 11,473,062,883.87/121,906.59
  6. Step 6: Final answer
    x = 94,113.56

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1.5x scale

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.