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Finding the Fourth Proportional to 121,738.68, 168,000.21 and 68,025.96

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Solution

The fourth proportional to 121,738.68, 168,000.21 and 68,025.96 is: 93,876.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,738.68 : 168,000.21 = 68,025.96 : x
  2. Step 2: Convert to fraction form
    121,738.68/168,000.21 = 68,025.96/x
  3. Step 3: Cross multiply
    121,738.68x = 168,000.21 × 68,025.96
  4. Step 4: Simplify right side
    121,738.68x = 11,428,375,565.45
  5. Step 5: Solve for x
    x = 11,428,375,565.45/121,738.68
  6. Step 6: Final answer
    x = 93,876.29

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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.