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Finding the Fourth Proportional to 130.87, 196.17 and 79.37

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Solution

The fourth proportional to 130.87, 196.17 and 79.37 is: 118.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.87 : 196.17 = 79.37 : x
  2. Step 2: Convert to fraction form
    130.87/196.17 = 79.37/x
  3. Step 3: Cross multiply
    130.87x = 196.17 × 79.37
  4. Step 4: Simplify right side
    130.87x = 15,570.01
  5. Step 5: Solve for x
    x = 15,570.01/130.87
  6. Step 6: Final answer
    x = 118.97

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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.