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Finding the Fourth Proportional to 172,661.97, 238,273.94 and 100,078.89

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Solution

The fourth proportional to 172,661.97, 238,273.94 and 100,078.89 is: 138,109.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,661.97 : 238,273.94 = 100,078.89 : x
  2. Step 2: Convert to fraction form
    172,661.97/238,273.94 = 100,078.89/x
  3. Step 3: Cross multiply
    172,661.97x = 238,273.94 × 100,078.89
  4. Step 4: Simplify right side
    172,661.97x = 23,846,191,431.13
  5. Step 5: Solve for x
    x = 23,846,191,431.13/172,661.97
  6. Step 6: Final answer
    x = 138,109.11

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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.