Home / 91,213.20-136,560.60-80,845.20

Finding the Fourth Proportional to 91,213.20, 136,560.60 and 80,845.20

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Solution

The fourth proportional to 91,213.20, 136,560.60 and 80,845.20 is: 121,038.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,213.20 : 136,560.60 = 80,845.20 : x
  2. Step 2: Convert to fraction form
    91,213.20/136,560.60 = 80,845.20/x
  3. Step 3: Cross multiply
    91,213.20x = 136,560.60 × 80,845.20
  4. Step 4: Simplify right side
    91,213.20x = 11,040,269,019.12
  5. Step 5: Solve for x
    x = 11,040,269,019.12/91,213.20
  6. Step 6: Final answer
    x = 121,038.06

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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.