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Finding the Fourth Proportional to 130.11, 195.19 and 38.80

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Solution

The fourth proportional to 130.11, 195.19 and 38.80 is: 58.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.11 : 195.19 = 38.80 : x
  2. Step 2: Convert to fraction form
    130.11/195.19 = 38.80/x
  3. Step 3: Cross multiply
    130.11x = 195.19 × 38.80
  4. Step 4: Simplify right side
    130.11x = 7,574.08
  5. Step 5: Solve for x
    x = 7,574.08/130.11
  6. Step 6: Final answer
    x = 58.21

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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.