Finding the Fourth Proportional to 161.99, 242.99 and 139.31
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Solution
The fourth proportional to 161.99, 242.99 and 139.31 is: 208.97
Step by Step Solution
- Step 1: Write the proportion equation
161.99 : 242.99 = 139.31 : x - Step 2: Convert to fraction form
161.99/242.99 = 139.31/x - Step 3: Cross multiply
161.99x = 242.99 × 139.31 - Step 4: Simplify right side
161.99x = 33,850.94 - Step 5: Solve for x
x = 33,850.94/161.99 - Step 6: Final answer
x = 208.97
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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.