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Finding the Fourth Proportional to 139,696.25, 192,781.62 and 76,033.89

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Solution

The fourth proportional to 139,696.25, 192,781.62 and 76,033.89 is: 104,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,696.25 : 192,781.62 = 76,033.89 : x
  2. Step 2: Convert to fraction form
    139,696.25/192,781.62 = 76,033.89/x
  3. Step 3: Cross multiply
    139,696.25x = 192,781.62 × 76,033.89
  4. Step 4: Simplify right side
    139,696.25x = 14,657,936,489.10
  5. Step 5: Solve for x
    x = 14,657,936,489.10/139,696.25
  6. Step 6: Final answer
    x = 104,927.20

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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.