Finding the Fourth Proportional to 79.09, 118.09 and 69.75
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Solution
The fourth proportional to 79.09, 118.09 and 69.75 is: 104.14
Step by Step Solution
- Step 1: Write the proportion equation
79.09 : 118.09 = 69.75 : x - Step 2: Convert to fraction form
79.09/118.09 = 69.75/x - Step 3: Cross multiply
79.09x = 118.09 × 69.75 - Step 4: Simplify right side
79.09x = 8,236.47 - Step 5: Solve for x
x = 8,236.47/79.09 - Step 6: Final answer
x = 104.14
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.