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Finding the Fourth Proportional to 68,383.45, 102,564.91 and 21,630.25

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Solution

The fourth proportional to 68,383.45, 102,564.91 and 21,630.25 is: 32,442.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,383.45 : 102,564.91 = 21,630.25 : x
  2. Step 2: Convert to fraction form
    68,383.45/102,564.91 = 21,630.25/x
  3. Step 3: Cross multiply
    68,383.45x = 102,564.91 × 21,630.25
  4. Step 4: Simplify right side
    68,383.45x = 2,218,504,644.53
  5. Step 5: Solve for x
    x = 2,218,504,644.53/68,383.45
  6. Step 6: Final answer
    x = 32,442.13

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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.