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Finding the Fourth Proportional to 123,238.56, 170,068.44 and 66,649.80

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Solution

The fourth proportional to 123,238.56, 170,068.44 and 66,649.80 is: 91,976.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,238.56 : 170,068.44 = 66,649.80 : x
  2. Step 2: Convert to fraction form
    123,238.56/170,068.44 = 66,649.80/x
  3. Step 3: Cross multiply
    123,238.56x = 170,068.44 × 66,649.80
  4. Step 4: Simplify right side
    123,238.56x = 11,335,027,512.31
  5. Step 5: Solve for x
    x = 11,335,027,512.31/123,238.56
  6. Step 6: Final answer
    x = 91,976.31

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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.