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Finding the Fourth Proportional to 90,587.88, 135,936.96 and 57,261.96

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Solution

The fourth proportional to 90,587.88, 135,936.96 and 57,261.96 is: 85,927.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,587.88 : 135,936.96 = 57,261.96 : x
  2. Step 2: Convert to fraction form
    90,587.88/135,936.96 = 57,261.96/x
  3. Step 3: Cross multiply
    90,587.88x = 135,936.96 × 57,261.96
  4. Step 4: Simplify right side
    90,587.88x = 7,784,016,766.04
  5. Step 5: Solve for x
    x = 7,784,016,766.04/90,587.88
  6. Step 6: Final answer
    x = 85,927.79

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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.