Finding the Fourth Proportional to 157.36, 216.26 and 122.80
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Solution
The fourth proportional to 157.36, 216.26 and 122.80 is: 168.76
Step by Step Solution
- Step 1: Write the proportion equation
157.36 : 216.26 = 122.80 : x - Step 2: Convert to fraction form
157.36/216.26 = 122.80/x - Step 3: Cross multiply
157.36x = 216.26 × 122.80 - Step 4: Simplify right side
157.36x = 26,556.73 - Step 5: Solve for x
x = 26,556.73/157.36 - Step 6: Final answer
x = 168.76
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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.