Finding the Fourth Proportional to 211,613.81, 317,431.09 and 85,236.99
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Solution
The fourth proportional to 211,613.81, 317,431.09 and 85,236.99 is: 127,859.66
Step by Step Solution
- Step 1: Write the proportion equation
211,613.81 : 317,431.09 = 85,236.99 : x - Step 2: Convert to fraction form
211,613.81/317,431.09 = 85,236.99/x - Step 3: Cross multiply
211,613.81x = 317,431.09 × 85,236.99 - Step 4: Simplify right side
211,613.81x = 27,056,869,551.93 - Step 5: Solve for x
x = 27,056,869,551.93/211,613.81 - Step 6: Final answer
x = 127,859.66
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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.