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Finding the Fourth Proportional to 207,911.60, 311,406.60 and 161,012.40

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Solution

The fourth proportional to 207,911.60, 311,406.60 and 161,012.40 is: 241,161.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,911.60 : 311,406.60 = 161,012.40 : x
  2. Step 2: Convert to fraction form
    207,911.60/311,406.60 = 161,012.40/x
  3. Step 3: Cross multiply
    207,911.60x = 311,406.60 × 161,012.40
  4. Step 4: Simplify right side
    207,911.60x = 50,140,324,041.84
  5. Step 5: Solve for x
    x = 50,140,324,041.84/207,911.60
  6. Step 6: Final answer
    x = 241,161.74

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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.