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Finding the Fourth Proportional to 68,179.20, 102,261.60 and 21,429.60

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Solution

The fourth proportional to 68,179.20, 102,261.60 and 21,429.60 is: 32,142.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,179.20 : 102,261.60 = 21,429.60 : x
  2. Step 2: Convert to fraction form
    68,179.20/102,261.60 = 21,429.60/x
  3. Step 3: Cross multiply
    68,179.20x = 102,261.60 × 21,429.60
  4. Step 4: Simplify right side
    68,179.20x = 2,191,425,183.36
  5. Step 5: Solve for x
    x = 2,191,425,183.36/68,179.20
  6. Step 6: Final answer
    x = 32,142.14

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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.