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Finding the Fourth Proportional to 68,469.08, 102,659.65 and 28,515.77

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Solution

The fourth proportional to 68,469.08, 102,659.65 and 28,515.77 is: 42,755.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,469.08 : 102,659.65 = 28,515.77 : x
  2. Step 2: Convert to fraction form
    68,469.08/102,659.65 = 28,515.77/x
  3. Step 3: Cross multiply
    68,469.08x = 102,659.65 × 28,515.77
  4. Step 4: Simplify right side
    68,469.08x = 2,927,418,383.09
  5. Step 5: Solve for x
    x = 2,927,418,383.09/68,469.08
  6. Step 6: Final answer
    x = 42,755.33

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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.