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Finding the Fourth Proportional to 149.99, 207.11 and 115.36

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Solution

The fourth proportional to 149.99, 207.11 and 115.36 is: 159.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.99 : 207.11 = 115.36 : x
  2. Step 2: Convert to fraction form
    149.99/207.11 = 115.36/x
  3. Step 3: Cross multiply
    149.99x = 207.11 × 115.36
  4. Step 4: Simplify right side
    149.99x = 23,891.98
  5. Step 5: Solve for x
    x = 23,891.98/149.99
  6. Step 6: Final answer
    x = 159.30

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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.