Finding the Fourth Proportional to 84.51, 116.36 and 77.99
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Solution
The fourth proportional to 84.51, 116.36 and 77.99 is: 107.37
Step by Step Solution
- Step 1: Write the proportion equation
84.51 : 116.36 = 77.99 : x - Step 2: Convert to fraction form
84.51/116.36 = 77.99/x - Step 3: Cross multiply
84.51x = 116.36 × 77.99 - Step 4: Simplify right side
84.51x = 9,073.94 - Step 5: Solve for x
x = 9,073.94/84.51 - Step 6: Final answer
x = 107.37
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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.