Finding the Fourth Proportional to 161.70, 242.26 and 115.81
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Solution
The fourth proportional to 161.70, 242.26 and 115.81 is: 173.51
Step by Step Solution
- Step 1: Write the proportion equation
161.70 : 242.26 = 115.81 : x - Step 2: Convert to fraction form
161.70/242.26 = 115.81/x - Step 3: Cross multiply
161.70x = 242.26 × 115.81 - Step 4: Simplify right side
161.70x = 28,056.13 - Step 5: Solve for x
x = 28,056.13/161.70 - Step 6: Final answer
x = 173.51
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.