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Finding the Fourth Proportional to 66,321.63, 91,489.64 and 41,127.39

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Solution

The fourth proportional to 66,321.63, 91,489.64 and 41,127.39 is: 56,734.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,321.63 : 91,489.64 = 41,127.39 : x
  2. Step 2: Convert to fraction form
    66,321.63/91,489.64 = 41,127.39/x
  3. Step 3: Cross multiply
    66,321.63x = 91,489.64 × 41,127.39
  4. Step 4: Simplify right side
    66,321.63x = 3,762,729,899.60
  5. Step 5: Solve for x
    x = 3,762,729,899.60/66,321.63
  6. Step 6: Final answer
    x = 56,734.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.