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Finding the Fourth Proportional to 123,187.94, 169,999.56 and 66,599.31

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Solution

The fourth proportional to 123,187.94, 169,999.56 and 66,599.31 is: 91,907.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,187.94 : 169,999.56 = 66,599.31 : x
  2. Step 2: Convert to fraction form
    123,187.94/169,999.56 = 66,599.31/x
  3. Step 3: Cross multiply
    123,187.94x = 169,999.56 × 66,599.31
  4. Step 4: Simplify right side
    123,187.94x = 11,321,854,033.80
  5. Step 5: Solve for x
    x = 11,321,854,033.80/123,187.94
  6. Step 6: Final answer
    x = 91,907.16

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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.