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Finding the Fourth Proportional to 133.31, 199.99 and 52.15

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Solution

The fourth proportional to 133.31, 199.99 and 52.15 is: 78.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.31 : 199.99 = 52.15 : x
  2. Step 2: Convert to fraction form
    133.31/199.99 = 52.15/x
  3. Step 3: Cross multiply
    133.31x = 199.99 × 52.15
  4. Step 4: Simplify right side
    133.31x = 10,429.48
  5. Step 5: Solve for x
    x = 10,429.48/133.31
  6. Step 6: Final answer
    x = 78.23

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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.