Finding the Fourth Proportional to 79.49, 118.91 and 71.99
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Solution
The fourth proportional to 79.49, 118.91 and 71.99 is: 107.69
Step by Step Solution
- Step 1: Write the proportion equation
79.49 : 118.91 = 71.99 : x - Step 2: Convert to fraction form
79.49/118.91 = 71.99/x - Step 3: Cross multiply
79.49x = 118.91 × 71.99 - Step 4: Simplify right side
79.49x = 8,559.38 - Step 5: Solve for x
x = 8,559.38/79.49 - Step 6: Final answer
x = 107.69
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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.