Finding the Fourth Proportional to 112.68, 155.47 and 84.99
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Solution
The fourth proportional to 112.68, 155.47 and 84.99 is: 117.26
Step by Step Solution
- Step 1: Write the proportion equation
112.68 : 155.47 = 84.99 : x - Step 2: Convert to fraction form
112.68/155.47 = 84.99/x - Step 3: Cross multiply
112.68x = 155.47 × 84.99 - Step 4: Simplify right side
112.68x = 13,212.62 - Step 5: Solve for x
x = 13,212.62/112.68 - Step 6: Final answer
x = 117.26
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.