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Finding the Fourth Proportional to 200,421.54, 300,639.60 and 67,306.14

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Solution

The fourth proportional to 200,421.54, 300,639.60 and 67,306.14 is: 100,961.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,421.54 : 300,639.60 = 67,306.14 : x
  2. Step 2: Convert to fraction form
    200,421.54/300,639.60 = 67,306.14/x
  3. Step 3: Cross multiply
    200,421.54x = 300,639.60 × 67,306.14
  4. Step 4: Simplify right side
    200,421.54x = 20,234,891,007.14
  5. Step 5: Solve for x
    x = 20,234,891,007.14/200,421.54
  6. Step 6: Final answer
    x = 100,961.66

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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.