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Finding the Fourth Proportional to 198,866.01, 274,435.65 and 108,221.88

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Solution

The fourth proportional to 198,866.01, 274,435.65 and 108,221.88 is: 149,346.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,866.01 : 274,435.65 = 108,221.88 : x
  2. Step 2: Convert to fraction form
    198,866.01/274,435.65 = 108,221.88/x
  3. Step 3: Cross multiply
    198,866.01x = 274,435.65 × 108,221.88
  4. Step 4: Simplify right side
    198,866.01x = 29,699,941,982.02
  5. Step 5: Solve for x
    x = 29,699,941,982.02/198,866.01
  6. Step 6: Final answer
    x = 149,346.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.