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Finding the Fourth Proportional to 122,081.22, 168,486.53 and 68,355.86

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Solution

The fourth proportional to 122,081.22, 168,486.53 and 68,355.86 is: 94,339.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,081.22 : 168,486.53 = 68,355.86 : x
  2. Step 2: Convert to fraction form
    122,081.22/168,486.53 = 68,355.86/x
  3. Step 3: Cross multiply
    122,081.22x = 168,486.53 × 68,355.86
  4. Step 4: Simplify right side
    122,081.22x = 11,517,040,472.35
  5. Step 5: Solve for x
    x = 11,517,040,472.35/122,081.22
  6. Step 6: Final answer
    x = 94,339.17

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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.