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Finding the Fourth Proportional to 118,991.99, 164,196.78 and 71,244.11

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Solution

The fourth proportional to 118,991.99, 164,196.78 and 71,244.11 is: 98,309.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,991.99 : 164,196.78 = 71,244.11 : x
  2. Step 2: Convert to fraction form
    118,991.99/164,196.78 = 71,244.11/x
  3. Step 3: Cross multiply
    118,991.99x = 164,196.78 × 71,244.11
  4. Step 4: Simplify right side
    118,991.99x = 11,698,053,455.97
  5. Step 5: Solve for x
    x = 11,698,053,455.97/118,991.99
  6. Step 6: Final answer
    x = 98,309.59

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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.