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Finding the Fourth Proportional to 66,886.43, 100,321.44 and 38,821.75

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Solution

The fourth proportional to 66,886.43, 100,321.44 and 38,821.75 is: 58,227.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,886.43 : 100,321.44 = 38,821.75 : x
  2. Step 2: Convert to fraction form
    66,886.43/100,321.44 = 38,821.75/x
  3. Step 3: Cross multiply
    66,886.43x = 100,321.44 × 38,821.75
  4. Step 4: Simplify right side
    66,886.43x = 3,894,653,863.32
  5. Step 5: Solve for x
    x = 3,894,653,863.32/66,886.43
  6. Step 6: Final answer
    x = 58,227.86

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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.