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Finding the Fourth Proportional to 122,380.78, 168,876.62 and 67,935.90

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Solution

The fourth proportional to 122,380.78, 168,876.62 and 67,935.90 is: 93,746.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,380.78 : 168,876.62 = 67,935.90 : x
  2. Step 2: Convert to fraction form
    122,380.78/168,876.62 = 67,935.90/x
  3. Step 3: Cross multiply
    122,380.78x = 168,876.62 × 67,935.90
  4. Step 4: Simplify right side
    122,380.78x = 11,472,785,168.66
  5. Step 5: Solve for x
    x = 11,472,785,168.66/122,380.78
  6. Step 6: Final answer
    x = 93,746.63

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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.