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Finding the Fourth Proportional to 200,561.40, 300,769.20 and 100,688.40

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Solution

The fourth proportional to 200,561.40, 300,769.20 and 100,688.40 is: 150,996.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,561.40 : 300,769.20 = 100,688.40 : x
  2. Step 2: Convert to fraction form
    200,561.40/300,769.20 = 100,688.40/x
  3. Step 3: Cross multiply
    200,561.40x = 300,769.20 × 100,688.40
  4. Step 4: Simplify right side
    200,561.40x = 30,283,969,517.28
  5. Step 5: Solve for x
    x = 30,283,969,517.28/200,561.40
  6. Step 6: Final answer
    x = 150,996.00

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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.