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Finding the Fourth Proportional to 200,421.53, 300,632.21 and 80,478.44

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Solution

The fourth proportional to 200,421.53, 300,632.21 and 80,478.44 is: 120,717.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,421.53 : 300,632.21 = 80,478.44 : x
  2. Step 2: Convert to fraction form
    200,421.53/300,632.21 = 80,478.44/x
  3. Step 3: Cross multiply
    200,421.53x = 300,632.21 × 80,478.44
  4. Step 4: Simplify right side
    200,421.53x = 24,194,412,227.33
  5. Step 5: Solve for x
    x = 24,194,412,227.33/200,421.53
  6. Step 6: Final answer
    x = 120,717.63

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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.