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Finding the Fourth Proportional to 121,811.39, 168,100.97 and 68,099.39

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Solution

The fourth proportional to 121,811.39, 168,100.97 and 68,099.39 is: 93,977.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,811.39 : 168,100.97 = 68,099.39 : x
  2. Step 2: Convert to fraction form
    121,811.39/168,100.97 = 68,099.39/x
  3. Step 3: Cross multiply
    121,811.39x = 168,100.97 × 68,099.39
  4. Step 4: Simplify right side
    121,811.39x = 11,447,573,174.91
  5. Step 5: Solve for x
    x = 11,447,573,174.91/121,811.39
  6. Step 6: Final answer
    x = 93,977.86

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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.