Home / 121,921.54-168,243.82-68,197.35

Finding the Fourth Proportional to 121,921.54, 168,243.82 and 68,197.35

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Solution

The fourth proportional to 121,921.54, 168,243.82 and 68,197.35 is: 94,107.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,921.54 : 168,243.82 = 68,197.35 : x
  2. Step 2: Convert to fraction form
    121,921.54/168,243.82 = 68,197.35/x
  3. Step 3: Cross multiply
    121,921.54x = 168,243.82 × 68,197.35
  4. Step 4: Simplify right side
    121,921.54x = 11,473,782,677.88
  5. Step 5: Solve for x
    x = 11,473,782,677.88/121,921.54
  6. Step 6: Final answer
    x = 94,107.92

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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.