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Finding the Fourth Proportional to 123,393.87, 170,283.60 and 66,805.29

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Solution

The fourth proportional to 123,393.87, 170,283.60 and 66,805.29 is: 92,191.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,393.87 : 170,283.60 = 66,805.29 : x
  2. Step 2: Convert to fraction form
    123,393.87/170,283.60 = 66,805.29/x
  3. Step 3: Cross multiply
    123,393.87x = 170,283.60 × 66,805.29
  4. Step 4: Simplify right side
    123,393.87x = 11,375,845,280.24
  5. Step 5: Solve for x
    x = 11,375,845,280.24/123,393.87
  6. Step 6: Final answer
    x = 92,191.33

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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.