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Finding the Fourth Proportional to 119.37, 164.71 and 66.90

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Solution

The fourth proportional to 119.37, 164.71 and 66.90 is: 92.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.37 : 164.71 = 66.90 : x
  2. Step 2: Convert to fraction form
    119.37/164.71 = 66.90/x
  3. Step 3: Cross multiply
    119.37x = 164.71 × 66.90
  4. Step 4: Simplify right side
    119.37x = 11,018.69
  5. Step 5: Solve for x
    x = 11,018.69/119.37
  6. Step 6: Final answer
    x = 92.31

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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.