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Finding the Fourth Proportional to 198,573.43, 298,007.80 and 80,245.79

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Solution

The fourth proportional to 198,573.43, 298,007.80 and 80,245.79 is: 120,428.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,573.43 : 298,007.80 = 80,245.79 : x
  2. Step 2: Convert to fraction form
    198,573.43/298,007.80 = 80,245.79/x
  3. Step 3: Cross multiply
    198,573.43x = 298,007.80 × 80,245.79
  4. Step 4: Simplify right side
    198,573.43x = 23,913,871,136.55
  5. Step 5: Solve for x
    x = 23,913,871,136.55/198,573.43
  6. Step 6: Final answer
    x = 120,428.36

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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.