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Finding the Fourth Proportional to 66,928.65, 100,396.31 and 21,954.54

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Solution

The fourth proportional to 66,928.65, 100,396.31 and 21,954.54 is: 32,932.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,928.65 : 100,396.31 = 21,954.54 : x
  2. Step 2: Convert to fraction form
    66,928.65/100,396.31 = 21,954.54/x
  3. Step 3: Cross multiply
    66,928.65x = 100,396.31 × 21,954.54
  4. Step 4: Simplify right side
    66,928.65x = 2,204,155,193.96
  5. Step 5: Solve for x
    x = 2,204,155,193.96/66,928.65
  6. Step 6: Final answer
    x = 32,932.91

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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.