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Finding the Fourth Proportional to 122,379.36, 168,876.72 and 68,659.44

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Solution

The fourth proportional to 122,379.36, 168,876.72 and 68,659.44 is: 94,746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,379.36 : 168,876.72 = 68,659.44 : x
  2. Step 2: Convert to fraction form
    122,379.36/168,876.72 = 68,659.44/x
  3. Step 3: Cross multiply
    122,379.36x = 168,876.72 × 68,659.44
  4. Step 4: Simplify right side
    122,379.36x = 11,594,981,024.24
  5. Step 5: Solve for x
    x = 11,594,981,024.24/122,379.36
  6. Step 6: Final answer
    x = 94,746.21

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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.