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Finding the Fourth Proportional to 119.76, 164.51 and 118.41

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Solution

The fourth proportional to 119.76, 164.51 and 118.41 is: 162.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.76 : 164.51 = 118.41 : x
  2. Step 2: Convert to fraction form
    119.76/164.51 = 118.41/x
  3. Step 3: Cross multiply
    119.76x = 164.51 × 118.41
  4. Step 4: Simplify right side
    119.76x = 19,479.04
  5. Step 5: Solve for x
    x = 19,479.04/119.76
  6. Step 6: Final answer
    x = 162.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.