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Finding the Fourth Proportional to 68,796.38, 103,187.65 and 18,881.49

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Solution

The fourth proportional to 68,796.38, 103,187.65 and 18,881.49 is: 28,320.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,796.38 : 103,187.65 = 18,881.49 : x
  2. Step 2: Convert to fraction form
    68,796.38/103,187.65 = 18,881.49/x
  3. Step 3: Cross multiply
    68,796.38x = 103,187.65 × 18,881.49
  4. Step 4: Simplify right side
    68,796.38x = 1,948,336,581.60
  5. Step 5: Solve for x
    x = 1,948,336,581.60/68,796.38
  6. Step 6: Final answer
    x = 28,320.34

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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.