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Finding the Fourth Proportional to 207,899.60, 311,388.60 and 161,000.40

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Solution

The fourth proportional to 207,899.60, 311,388.60 and 161,000.40 is: 241,143.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,899.60 : 311,388.60 = 161,000.40 : x
  2. Step 2: Convert to fraction form
    207,899.60/311,388.60 = 161,000.40/x
  3. Step 3: Cross multiply
    207,899.60x = 311,388.60 × 161,000.40
  4. Step 4: Simplify right side
    207,899.60x = 50,133,689,155.44
  5. Step 5: Solve for x
    x = 50,133,689,155.44/207,899.60
  6. Step 6: Final answer
    x = 241,143.75

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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.