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Finding the Fourth Proportional to 130.77, 196.19 and 108.99

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Solution

The fourth proportional to 130.77, 196.19 and 108.99 is: 163.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.77 : 196.19 = 108.99 : x
  2. Step 2: Convert to fraction form
    130.77/196.19 = 108.99/x
  3. Step 3: Cross multiply
    130.77x = 196.19 × 108.99
  4. Step 4: Simplify right side
    130.77x = 21,382.20
  5. Step 5: Solve for x
    x = 21,382.20/130.77
  6. Step 6: Final answer
    x = 163.51

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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.