Finding the Fourth Proportional to 157.14, 216.95 and 122.18
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Solution
The fourth proportional to 157.14, 216.95 and 122.18 is: 168.67
Step by Step Solution
- Step 1: Write the proportion equation
157.14 : 216.95 = 122.18 : x - Step 2: Convert to fraction form
157.14/216.95 = 122.18/x - Step 3: Cross multiply
157.14x = 216.95 × 122.18 - Step 4: Simplify right side
157.14x = 26,505.26 - Step 5: Solve for x
x = 26,505.26/157.14 - Step 6: Final answer
x = 168.67
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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.