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Finding the Fourth Proportional to 130.66, 195.36 and 111.62

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Solution

The fourth proportional to 130.66, 195.36 and 111.62 is: 166.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.66 : 195.36 = 111.62 : x
  2. Step 2: Convert to fraction form
    130.66/195.36 = 111.62/x
  3. Step 3: Cross multiply
    130.66x = 195.36 × 111.62
  4. Step 4: Simplify right side
    130.66x = 21,806.08
  5. Step 5: Solve for x
    x = 21,806.08/130.66
  6. Step 6: Final answer
    x = 166.89

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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.