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Finding the Fourth Proportional to 66,517.44, 99,742.80 and 22,128.56

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Solution

The fourth proportional to 66,517.44, 99,742.80 and 22,128.56 is: 33,181.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,517.44 : 99,742.80 = 22,128.56 : x
  2. Step 2: Convert to fraction form
    66,517.44/99,742.80 = 22,128.56/x
  3. Step 3: Cross multiply
    66,517.44x = 99,742.80 × 22,128.56
  4. Step 4: Simplify right side
    66,517.44x = 2,207,164,534.37
  5. Step 5: Solve for x
    x = 2,207,164,534.37/66,517.44
  6. Step 6: Final answer
    x = 33,181.74

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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.