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Finding the Fourth Proportional to 130.94, 197.19 and 109.47

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Solution

The fourth proportional to 130.94, 197.19 and 109.47 is: 164.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.94 : 197.19 = 109.47 : x
  2. Step 2: Convert to fraction form
    130.94/197.19 = 109.47/x
  3. Step 3: Cross multiply
    130.94x = 197.19 × 109.47
  4. Step 4: Simplify right side
    130.94x = 21,586.39
  5. Step 5: Solve for x
    x = 21,586.39/130.94
  6. Step 6: Final answer
    x = 164.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.