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Finding the Fourth Proportional to 130.26, 195.66 and 128.10

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Solution

The fourth proportional to 130.26, 195.66 and 128.10 is: 192.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.26 : 195.66 = 128.10 : x
  2. Step 2: Convert to fraction form
    130.26/195.66 = 128.10/x
  3. Step 3: Cross multiply
    130.26x = 195.66 × 128.10
  4. Step 4: Simplify right side
    130.26x = 25,064.05
  5. Step 5: Solve for x
    x = 25,064.05/130.26
  6. Step 6: Final answer
    x = 192.42

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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.