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Finding the Fourth Proportional to 91,231.60, 136,847.40 and 80,863.60

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Solution

The fourth proportional to 91,231.60, 136,847.40 and 80,863.60 is: 121,295.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,231.60 : 136,847.40 = 80,863.60 : x
  2. Step 2: Convert to fraction form
    91,231.60/136,847.40 = 80,863.60/x
  3. Step 3: Cross multiply
    91,231.60x = 136,847.40 × 80,863.60
  4. Step 4: Simplify right side
    91,231.60x = 11,065,973,414.64
  5. Step 5: Solve for x
    x = 11,065,973,414.64/91,231.60
  6. Step 6: Final answer
    x = 121,295.40

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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.