Finding the Fourth Proportional to 161.65, 242.44 and 74.99
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Solution
The fourth proportional to 161.65, 242.44 and 74.99 is: 112.47
Step by Step Solution
- Step 1: Write the proportion equation
161.65 : 242.44 = 74.99 : x - Step 2: Convert to fraction form
161.65/242.44 = 74.99/x - Step 3: Cross multiply
161.65x = 242.44 × 74.99 - Step 4: Simplify right side
161.65x = 18,180.58 - Step 5: Solve for x
x = 18,180.58/161.65 - Step 6: Final answer
x = 112.47
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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.