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Finding the Fourth Proportional to 198,663.71, 298,182.84 and 72,425.96

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Solution

The fourth proportional to 198,663.71, 298,182.84 and 72,425.96 is: 108,707.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,663.71 : 298,182.84 = 72,425.96 : x
  2. Step 2: Convert to fraction form
    198,663.71/298,182.84 = 72,425.96/x
  3. Step 3: Cross multiply
    198,663.71x = 298,182.84 × 72,425.96
  4. Step 4: Simplify right side
    198,663.71x = 21,596,179,187.98
  5. Step 5: Solve for x
    x = 21,596,179,187.98/198,663.71
  6. Step 6: Final answer
    x = 108,707.22

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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.