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Finding the Fourth Proportional to 199.98, 299.96 and 78.27

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Solution

The fourth proportional to 199.98, 299.96 and 78.27 is: 117.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.98 : 299.96 = 78.27 : x
  2. Step 2: Convert to fraction form
    199.98/299.96 = 78.27/x
  3. Step 3: Cross multiply
    199.98x = 299.96 × 78.27
  4. Step 4: Simplify right side
    199.98x = 23,478.06
  5. Step 5: Solve for x
    x = 23,478.06/199.98
  6. Step 6: Final answer
    x = 117.40

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.