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Finding the Fourth Proportional to 68,635.32, 102,951.90 and 21,887.88

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Solution

The fourth proportional to 68,635.32, 102,951.90 and 21,887.88 is: 32,831.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,635.32 : 102,951.90 = 21,887.88 : x
  2. Step 2: Convert to fraction form
    68,635.32/102,951.90 = 21,887.88/x
  3. Step 3: Cross multiply
    68,635.32x = 102,951.90 × 21,887.88
  4. Step 4: Simplify right side
    68,635.32x = 2,253,398,832.97
  5. Step 5: Solve for x
    x = 2,253,398,832.97/68,635.32
  6. Step 6: Final answer
    x = 32,831.48

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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.