Finding the Fourth Proportional to 84.84, 116.96 and 55.70
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Solution
The fourth proportional to 84.84, 116.96 and 55.70 is: 76.79
Step by Step Solution
- Step 1: Write the proportion equation
84.84 : 116.96 = 55.70 : x - Step 2: Convert to fraction form
84.84/116.96 = 55.70/x - Step 3: Cross multiply
84.84x = 116.96 × 55.70 - Step 4: Simplify right side
84.84x = 6,514.67 - Step 5: Solve for x
x = 6,514.67/84.84 - Step 6: Final answer
x = 76.79
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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.