Finding the Fourth Proportional to 118.91, 163.99 and 77.44
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Solution
The fourth proportional to 118.91, 163.99 and 77.44 is: 106.80
Step by Step Solution
- Step 1: Write the proportion equation
118.91 : 163.99 = 77.44 : x - Step 2: Convert to fraction form
118.91/163.99 = 77.44/x - Step 3: Cross multiply
118.91x = 163.99 × 77.44 - Step 4: Simplify right side
118.91x = 12,699.39 - Step 5: Solve for x
x = 12,699.39/118.91 - Step 6: Final answer
x = 106.80
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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.