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Finding the Fourth Proportional to 123,539.81, 170,480.36 and 66,949.97

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Solution

The fourth proportional to 123,539.81, 170,480.36 and 66,949.97 is: 92,388.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,539.81 : 170,480.36 = 66,949.97 : x
  2. Step 2: Convert to fraction form
    123,539.81/170,480.36 = 66,949.97/x
  3. Step 3: Cross multiply
    123,539.81x = 170,480.36 × 66,949.97
  4. Step 4: Simplify right side
    123,539.81x = 11,413,654,302.56
  5. Step 5: Solve for x
    x = 11,413,654,302.56/123,539.81
  6. Step 6: Final answer
    x = 92,388.48

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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.