Finding the Fourth Proportional to 161.58, 242.21 and 79.26
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Solution
The fourth proportional to 161.58, 242.21 and 79.26 is: 118.81
Step by Step Solution
- Step 1: Write the proportion equation
161.58 : 242.21 = 79.26 : x - Step 2: Convert to fraction form
161.58/242.21 = 79.26/x - Step 3: Cross multiply
161.58x = 242.21 × 79.26 - Step 4: Simplify right side
161.58x = 19,197.17 - Step 5: Solve for x
x = 19,197.17/161.58 - Step 6: Final answer
x = 118.81
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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.