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Finding the Fourth Proportional to 199,593.70, 299,432.15 and 66,515.30

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Solution

The fourth proportional to 199,593.70, 299,432.15 and 66,515.30 is: 99,786.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,593.70 : 299,432.15 = 66,515.30 : x
  2. Step 2: Convert to fraction form
    199,593.70/299,432.15 = 66,515.30/x
  3. Step 3: Cross multiply
    199,593.70x = 299,432.15 × 66,515.30
  4. Step 4: Simplify right side
    199,593.70x = 19,916,819,286.90
  5. Step 5: Solve for x
    x = 19,916,819,286.90/199,593.70
  6. Step 6: Final answer
    x = 99,786.81

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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.