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Finding the Fourth Proportional to 198,650.50, 298,163.01 and 72,412.76

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Solution

The fourth proportional to 198,650.50, 298,163.01 and 72,412.76 is: 108,687.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,650.50 : 298,163.01 = 72,412.76 : x
  2. Step 2: Convert to fraction form
    198,650.50/298,163.01 = 72,412.76/x
  3. Step 3: Cross multiply
    198,650.50x = 298,163.01 × 72,412.76
  4. Step 4: Simplify right side
    198,650.50x = 21,590,804,631.13
  5. Step 5: Solve for x
    x = 21,590,804,631.13/198,650.50
  6. Step 6: Final answer
    x = 108,687.39

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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.