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Finding the Fourth Proportional to 68,107.80, 102,201.72 and 28,661.88

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Solution

The fourth proportional to 68,107.80, 102,201.72 and 28,661.88 is: 43,009.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,107.80 : 102,201.72 = 28,661.88 : x
  2. Step 2: Convert to fraction form
    68,107.80/102,201.72 = 28,661.88/x
  3. Step 3: Cross multiply
    68,107.80x = 102,201.72 × 28,661.88
  4. Step 4: Simplify right side
    68,107.80x = 2,929,293,434.43
  5. Step 5: Solve for x
    x = 2,929,293,434.43/68,107.80
  6. Step 6: Final answer
    x = 43,009.66

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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.