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Finding the Fourth Proportional to 172,841.10, 259,218.45 and 66,201.90

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Solution

The fourth proportional to 172,841.10, 259,218.45 and 66,201.90 is: 99,286.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,841.10 : 259,218.45 = 66,201.90 : x
  2. Step 2: Convert to fraction form
    172,841.10/259,218.45 = 66,201.90/x
  3. Step 3: Cross multiply
    172,841.10x = 259,218.45 × 66,201.90
  4. Step 4: Simplify right side
    172,841.10x = 17,160,753,905.06
  5. Step 5: Solve for x
    x = 17,160,753,905.06/172,841.10
  6. Step 6: Final answer
    x = 99,286.30

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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.