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Finding the Fourth Proportional to 68,796.63, 103,188.02 and 18,881.75

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Solution

The fourth proportional to 68,796.63, 103,188.02 and 18,881.75 is: 28,320.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,796.63 : 103,188.02 = 18,881.75 : x
  2. Step 2: Convert to fraction form
    68,796.63/103,188.02 = 18,881.75/x
  3. Step 3: Cross multiply
    68,796.63x = 103,188.02 × 18,881.75
  4. Step 4: Simplify right side
    68,796.63x = 1,948,370,560.20
  5. Step 5: Solve for x
    x = 1,948,370,560.20/68,796.63
  6. Step 6: Final answer
    x = 28,320.73

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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.