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Finding the Fourth Proportional to 66,618.56, 99,926.44 and 21,639.88

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Solution

The fourth proportional to 66,618.56, 99,926.44 and 21,639.88 is: 32,459.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,618.56 : 99,926.44 = 21,639.88 : x
  2. Step 2: Convert to fraction form
    66,618.56/99,926.44 = 21,639.88/x
  3. Step 3: Cross multiply
    66,618.56x = 99,926.44 × 21,639.88
  4. Step 4: Simplify right side
    66,618.56x = 2,162,396,170.43
  5. Step 5: Solve for x
    x = 2,162,396,170.43/66,618.56
  6. Step 6: Final answer
    x = 32,459.37

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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.