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Finding the Fourth Proportional to 68,670.12, 102,939.42 and 21,892.68

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Solution

The fourth proportional to 68,670.12, 102,939.42 and 21,892.68 is: 32,818.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,670.12 : 102,939.42 = 21,892.68 : x
  2. Step 2: Convert to fraction form
    68,670.12/102,939.42 = 21,892.68/x
  3. Step 3: Cross multiply
    68,670.12x = 102,939.42 × 21,892.68
  4. Step 4: Simplify right side
    68,670.12x = 2,253,619,781.45
  5. Step 5: Solve for x
    x = 2,253,619,781.45/68,670.12
  6. Step 6: Final answer
    x = 32,818.06

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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.