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Finding the Fourth Proportional to 66,203.64, 91,361.45 and 35,989.22

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Solution

The fourth proportional to 66,203.64, 91,361.45 and 35,989.22 is: 49,665.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,203.64 : 91,361.45 = 35,989.22 : x
  2. Step 2: Convert to fraction form
    66,203.64/91,361.45 = 35,989.22/x
  3. Step 3: Cross multiply
    66,203.64x = 91,361.45 × 35,989.22
  4. Step 4: Simplify right side
    66,203.64x = 3,288,027,641.95
  5. Step 5: Solve for x
    x = 3,288,027,641.95/66,203.64
  6. Step 6: Final answer
    x = 49,665.36

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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.