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Finding the Fourth Proportional to 68,446.74, 102,679.96 and 21,065.84

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Solution

The fourth proportional to 68,446.74, 102,679.96 and 21,065.84 is: 31,601.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,446.74 : 102,679.96 = 21,065.84 : x
  2. Step 2: Convert to fraction form
    68,446.74/102,679.96 = 21,065.84/x
  3. Step 3: Cross multiply
    68,446.74x = 102,679.96 × 21,065.84
  4. Step 4: Simplify right side
    68,446.74x = 2,163,039,608.57
  5. Step 5: Solve for x
    x = 2,163,039,608.57/68,446.74
  6. Step 6: Final answer
    x = 31,601.79

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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.