Finding the Fourth Proportional to 79.68, 119.61 and 76.44
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Solution
The fourth proportional to 79.68, 119.61 and 76.44 is: 114.75
Step by Step Solution
- Step 1: Write the proportion equation
79.68 : 119.61 = 76.44 : x - Step 2: Convert to fraction form
79.68/119.61 = 76.44/x - Step 3: Cross multiply
79.68x = 119.61 × 76.44 - Step 4: Simplify right side
79.68x = 9,142.99 - Step 5: Solve for x
x = 9,142.99/79.68 - Step 6: Final answer
x = 114.75
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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.