Finding the Fourth Proportional to 84.52, 116.74 and 76.74
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Solution
The fourth proportional to 84.52, 116.74 and 76.74 is: 105.99
Step by Step Solution
- Step 1: Write the proportion equation
84.52 : 116.74 = 76.74 : x - Step 2: Convert to fraction form
84.52/116.74 = 76.74/x - Step 3: Cross multiply
84.52x = 116.74 × 76.74 - Step 4: Simplify right side
84.52x = 8,958.63 - Step 5: Solve for x
x = 8,958.63/84.52 - Step 6: Final answer
x = 105.99
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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.