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Finding the Fourth Proportional to 123,173.22, 169,979.14 and 72,175.78

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Solution

The fourth proportional to 123,173.22, 169,979.14 and 72,175.78 is: 99,602.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,173.22 : 169,979.14 = 72,175.78 : x
  2. Step 2: Convert to fraction form
    123,173.22/169,979.14 = 72,175.78/x
  3. Step 3: Cross multiply
    123,173.22x = 169,979.14 × 72,175.78
  4. Step 4: Simplify right side
    123,173.22x = 12,268,377,013.23
  5. Step 5: Solve for x
    x = 12,268,377,013.23/123,173.22
  6. Step 6: Final answer
    x = 99,602.63

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.