Home / 207,961.90-311,941.83-81,512.80

Finding the Fourth Proportional to 207,961.90, 311,941.83 and 81,512.80

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Solution

The fourth proportional to 207,961.90, 311,941.83 and 81,512.80 is: 122,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,961.90 : 311,941.83 = 81,512.80 : x
  2. Step 2: Convert to fraction form
    207,961.90/311,941.83 = 81,512.80/x
  3. Step 3: Cross multiply
    207,961.90x = 311,941.83 × 81,512.80
  4. Step 4: Simplify right side
    207,961.90x = 25,427,252,000.42
  5. Step 5: Solve for x
    x = 25,427,252,000.42/207,961.90
  6. Step 6: Final answer
    x = 122,268.80

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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.