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Finding the Fourth Proportional to 200,531.80, 300,786.63 and 67,398.32

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Solution

The fourth proportional to 200,531.80, 300,786.63 and 67,398.32 is: 101,093.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,531.80 : 300,786.63 = 67,398.32 : x
  2. Step 2: Convert to fraction form
    200,531.80/300,786.63 = 67,398.32/x
  3. Step 3: Cross multiply
    200,531.80x = 300,786.63 × 67,398.32
  4. Step 4: Simplify right side
    200,531.80x = 20,272,513,540.46
  5. Step 5: Solve for x
    x = 20,272,513,540.46/200,531.80
  6. Step 6: Final answer
    x = 101,093.76

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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.