Finding the Fourth Proportional to 79.40, 119.18 and 55.08
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Solution
The fourth proportional to 79.40, 119.18 and 55.08 is: 82.67
Step by Step Solution
- Step 1: Write the proportion equation
79.40 : 119.18 = 55.08 : x - Step 2: Convert to fraction form
79.40/119.18 = 55.08/x - Step 3: Cross multiply
79.40x = 119.18 × 55.08 - Step 4: Simplify right side
79.40x = 6,563.92 - Step 5: Solve for x
x = 6,563.92/79.40 - Step 6: Final answer
x = 82.67
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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.