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Finding the Fourth Proportional to 65,644.56, 90,361.44 and 57,246.48

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Solution

The fourth proportional to 65,644.56, 90,361.44 and 57,246.48 is: 78,801.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,644.56 : 90,361.44 = 57,246.48 : x
  2. Step 2: Convert to fraction form
    65,644.56/90,361.44 = 57,246.48/x
  3. Step 3: Cross multiply
    65,644.56x = 90,361.44 × 57,246.48
  4. Step 4: Simplify right side
    65,644.56x = 5,172,874,367.73
  5. Step 5: Solve for x
    x = 5,172,874,367.73/65,644.56
  6. Step 6: Final answer
    x = 78,801.26

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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.