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Finding the Fourth Proportional to 207,617.60, 311,311.20 and 82,817.60

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Solution

The fourth proportional to 207,617.60, 311,311.20 and 82,817.60 is: 124,180.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,617.60 : 311,311.20 = 82,817.60 : x
  2. Step 2: Convert to fraction form
    207,617.60/311,311.20 = 82,817.60/x
  3. Step 3: Cross multiply
    207,617.60x = 311,311.20 × 82,817.60
  4. Step 4: Simplify right side
    207,617.60x = 25,782,046,437.12
  5. Step 5: Solve for x
    x = 25,782,046,437.12/207,617.60
  6. Step 6: Final answer
    x = 124,180.45

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1.5x scale

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.