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Finding the Fourth Proportional to 123,172.66, 169,978.38 and 66,584.03

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Solution

The fourth proportional to 123,172.66, 169,978.38 and 66,584.03 is: 91,886.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,172.66 : 169,978.38 = 66,584.03 : x
  2. Step 2: Convert to fraction form
    123,172.66/169,978.38 = 66,584.03/x
  3. Step 3: Cross multiply
    123,172.66x = 169,978.38 × 66,584.03
  4. Step 4: Simplify right side
    123,172.66x = 11,317,845,553.27
  5. Step 5: Solve for x
    x = 11,317,845,553.27/123,172.66
  6. Step 6: Final answer
    x = 91,886.02

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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.