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Finding the Fourth Proportional to 68,918.76, 103,383.90 and 29,474.28

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Solution

The fourth proportional to 68,918.76, 103,383.90 and 29,474.28 is: 44,213.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,918.76 : 103,383.90 = 29,474.28 : x
  2. Step 2: Convert to fraction form
    68,918.76/103,383.90 = 29,474.28/x
  3. Step 3: Cross multiply
    68,918.76x = 103,383.90 × 29,474.28
  4. Step 4: Simplify right side
    68,918.76x = 3,047,166,016.09
  5. Step 5: Solve for x
    x = 3,047,166,016.09/68,918.76
  6. Step 6: Final answer
    x = 44,213.88

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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.