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Finding the Fourth Proportional to 68,401.61, 102,618.22 and 21,654.48

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Solution

The fourth proportional to 68,401.61, 102,618.22 and 21,654.48 is: 32,486.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,401.61 : 102,618.22 = 21,654.48 : x
  2. Step 2: Convert to fraction form
    68,401.61/102,618.22 = 21,654.48/x
  3. Step 3: Cross multiply
    68,401.61x = 102,618.22 × 21,654.48
  4. Step 4: Simplify right side
    68,401.61x = 2,222,144,192.63
  5. Step 5: Solve for x
    x = 2,222,144,192.63/68,401.61
  6. Step 6: Final answer
    x = 32,486.72

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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.