Finding the Fourth Proportional to 121.26, 181.80 and 91.02
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Solution
The fourth proportional to 121.26, 181.80 and 91.02 is: 136.46
Step by Step Solution
- Step 1: Write the proportion equation
121.26 : 181.80 = 91.02 : x - Step 2: Convert to fraction form
121.26/181.80 = 91.02/x - Step 3: Cross multiply
121.26x = 181.80 × 91.02 - Step 4: Simplify right side
121.26x = 16,547.44 - Step 5: Solve for x
x = 16,547.44/121.26 - Step 6: Final answer
x = 136.46
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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.