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Finding the Fourth Proportional to 119.06, 164.28 and 79.76

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Solution

The fourth proportional to 119.06, 164.28 and 79.76 is: 110.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.06 : 164.28 = 79.76 : x
  2. Step 2: Convert to fraction form
    119.06/164.28 = 79.76/x
  3. Step 3: Cross multiply
    119.06x = 164.28 × 79.76
  4. Step 4: Simplify right side
    119.06x = 13,102.97
  5. Step 5: Solve for x
    x = 13,102.97/119.06
  6. Step 6: Final answer
    x = 110.05

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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.