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Finding the Fourth Proportional to 130.44, 179.96 and 91.68

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Solution

The fourth proportional to 130.44, 179.96 and 91.68 is: 126.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.44 : 179.96 = 91.68 : x
  2. Step 2: Convert to fraction form
    130.44/179.96 = 91.68/x
  3. Step 3: Cross multiply
    130.44x = 179.96 × 91.68
  4. Step 4: Simplify right side
    130.44x = 16,498.73
  5. Step 5: Solve for x
    x = 16,498.73/130.44
  6. Step 6: Final answer
    x = 126.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.