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Finding the Fourth Proportional to 111.99, 167.99 and 104.70

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Solution

The fourth proportional to 111.99, 167.99 and 104.70 is: 157.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.99 : 167.99 = 104.70 : x
  2. Step 2: Convert to fraction form
    111.99/167.99 = 104.70/x
  3. Step 3: Cross multiply
    111.99x = 167.99 × 104.70
  4. Step 4: Simplify right side
    111.99x = 17,588.55
  5. Step 5: Solve for x
    x = 17,588.55/111.99
  6. Step 6: Final answer
    x = 157.05

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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.