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Finding the Fourth Proportional to 119.99, 180.01 and 38.81

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Solution

The fourth proportional to 119.99, 180.01 and 38.81 is: 58.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.99 : 180.01 = 38.81 : x
  2. Step 2: Convert to fraction form
    119.99/180.01 = 38.81/x
  3. Step 3: Cross multiply
    119.99x = 180.01 × 38.81
  4. Step 4: Simplify right side
    119.99x = 6,986.19
  5. Step 5: Solve for x
    x = 6,986.19/119.99
  6. Step 6: Final answer
    x = 58.22

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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.