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Finding the Fourth Proportional to 161,766.78, 223,239.78 and 89,172.25

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Solution

The fourth proportional to 161,766.78, 223,239.78 and 89,172.25 is: 123,058.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,766.78 : 223,239.78 = 89,172.25 : x
  2. Step 2: Convert to fraction form
    161,766.78/223,239.78 = 89,172.25/x
  3. Step 3: Cross multiply
    161,766.78x = 223,239.78 × 89,172.25
  4. Step 4: Simplify right side
    161,766.78x = 19,906,793,472.11
  5. Step 5: Solve for x
    x = 19,906,793,472.11/161,766.78
  6. Step 6: Final answer
    x = 123,058.60

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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.