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Finding the Fourth Proportional to 121,755.76, 168,022.46 and 68,040.76

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Solution

The fourth proportional to 121,755.76, 168,022.46 and 68,040.76 is: 93,895.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,755.76 : 168,022.46 = 68,040.76 : x
  2. Step 2: Convert to fraction form
    121,755.76/168,022.46 = 68,040.76/x
  3. Step 3: Cross multiply
    121,755.76x = 168,022.46 × 68,040.76
  4. Step 4: Simplify right side
    121,755.76x = 11,432,375,557.83
  5. Step 5: Solve for x
    x = 11,432,375,557.83/121,755.76
  6. Step 6: Final answer
    x = 93,895.97

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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.