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Finding the Fourth Proportional to 172,979.97, 259,504.97 and 73,140

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Solution

The fourth proportional to 172,979.97, 259,504.97 and 73,140 is: 109,724.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,979.97 : 259,504.97 = 73,140 : x
  2. Step 2: Convert to fraction form
    172,979.97/259,504.97 = 73,140/x
  3. Step 3: Cross multiply
    172,979.97x = 259,504.97 × 73,140
  4. Step 4: Simplify right side
    172,979.97x = 18,980,193,140.10
  5. Step 5: Solve for x
    x = 18,980,193,140.10/172,979.97
  6. Step 6: Final answer
    x = 109,724.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.