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Finding the Fourth Proportional to 199,611.86, 299,423.25 and 66,487.37

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Solution

The fourth proportional to 199,611.86, 299,423.25 and 66,487.37 is: 99,732.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,611.86 : 299,423.25 = 66,487.37 : x
  2. Step 2: Convert to fraction form
    199,611.86/299,423.25 = 66,487.37/x
  3. Step 3: Cross multiply
    199,611.86x = 299,423.25 × 66,487.37
  4. Step 4: Simplify right side
    199,611.86x = 19,907,862,912.24
  5. Step 5: Solve for x
    x = 19,907,862,912.24/199,611.86
  6. Step 6: Final answer
    x = 99,732.87

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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.