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Finding the Fourth Proportional to 119.68, 164.96 and 92.16

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Solution

The fourth proportional to 119.68, 164.96 and 92.16 is: 127.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.68 : 164.96 = 92.16 : x
  2. Step 2: Convert to fraction form
    119.68/164.96 = 92.16/x
  3. Step 3: Cross multiply
    119.68x = 164.96 × 92.16
  4. Step 4: Simplify right side
    119.68x = 15,202.71
  5. Step 5: Solve for x
    x = 15,202.71/119.68
  6. Step 6: Final answer
    x = 127.03

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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.