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Finding the Fourth Proportional to 123,379.93, 170,264.84 and 66,791.31

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Solution

The fourth proportional to 123,379.93, 170,264.84 and 66,791.31 is: 92,172.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,379.93 : 170,264.84 = 66,791.31 : x
  2. Step 2: Convert to fraction form
    123,379.93/170,264.84 = 66,791.31/x
  3. Step 3: Cross multiply
    123,379.93x = 170,264.84 × 66,791.31
  4. Step 4: Simplify right side
    123,379.93x = 11,372,211,710.54
  5. Step 5: Solve for x
    x = 11,372,211,710.54/123,379.93
  6. Step 6: Final answer
    x = 92,172.30

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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.