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Finding the Fourth Proportional to 68,672.76, 103,025.12 and 21,285.34

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Solution

The fourth proportional to 68,672.76, 103,025.12 and 21,285.34 is: 31,932.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,672.76 : 103,025.12 = 21,285.34 : x
  2. Step 2: Convert to fraction form
    68,672.76/103,025.12 = 21,285.34/x
  3. Step 3: Cross multiply
    68,672.76x = 103,025.12 × 21,285.34
  4. Step 4: Simplify right side
    68,672.76x = 2,192,925,102.86
  5. Step 5: Solve for x
    x = 2,192,925,102.86/68,672.76
  6. Step 6: Final answer
    x = 31,932.97

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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.