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Finding the Fourth Proportional to 121,961.58, 168,307.01 and 68,256.96

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Solution

The fourth proportional to 121,961.58, 168,307.01 and 68,256.96 is: 94,194.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,961.58 : 168,307.01 = 68,256.96 : x
  2. Step 2: Convert to fraction form
    121,961.58/168,307.01 = 68,256.96/x
  3. Step 3: Cross multiply
    121,961.58x = 168,307.01 × 68,256.96
  4. Step 4: Simplify right side
    121,961.58x = 11,488,124,508.00
  5. Step 5: Solve for x
    x = 11,488,124,508.00/121,961.58
  6. Step 6: Final answer
    x = 94,194.62

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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.