Finding the Fourth Proportional to 157.17, 216.77 and 122.21
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Solution
The fourth proportional to 157.17, 216.77 and 122.21 is: 168.55
Step by Step Solution
- Step 1: Write the proportion equation
157.17 : 216.77 = 122.21 : x - Step 2: Convert to fraction form
157.17/216.77 = 122.21/x - Step 3: Cross multiply
157.17x = 216.77 × 122.21 - Step 4: Simplify right side
157.17x = 26,491.46 - Step 5: Solve for x
x = 26,491.46/157.17 - Step 6: Final answer
x = 168.55
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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.