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Finding the Fourth Proportional to 66,100.44, 99,129.64 and 21,716.92

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Solution

The fourth proportional to 66,100.44, 99,129.64 and 21,716.92 is: 32,568.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,100.44 : 99,129.64 = 21,716.92 : x
  2. Step 2: Convert to fraction form
    66,100.44/99,129.64 = 21,716.92/x
  3. Step 3: Cross multiply
    66,100.44x = 99,129.64 × 21,716.92
  4. Step 4: Simplify right side
    66,100.44x = 2,152,790,461.51
  5. Step 5: Solve for x
    x = 2,152,790,461.51/66,100.44
  6. Step 6: Final answer
    x = 32,568.47

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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.