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Finding the Fourth Proportional to 198,636.78, 297,861.48 and 72,188.10

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Solution

The fourth proportional to 198,636.78, 297,861.48 and 72,188.10 is: 108,248.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,636.78 : 297,861.48 = 72,188.10 : x
  2. Step 2: Convert to fraction form
    198,636.78/297,861.48 = 72,188.10/x
  3. Step 3: Cross multiply
    198,636.78x = 297,861.48 × 72,188.10
  4. Step 4: Simplify right side
    198,636.78x = 21,502,054,304.39
  5. Step 5: Solve for x
    x = 21,502,054,304.39/198,636.78
  6. Step 6: Final answer
    x = 108,248.10

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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.