Finding the Fourth Proportional to 84.60, 115.92 and 84.06
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Solution
The fourth proportional to 84.60, 115.92 and 84.06 is: 115.18
Step by Step Solution
- Step 1: Write the proportion equation
84.60 : 115.92 = 84.06 : x - Step 2: Convert to fraction form
84.60/115.92 = 84.06/x - Step 3: Cross multiply
84.60x = 115.92 × 84.06 - Step 4: Simplify right side
84.60x = 9,744.24 - Step 5: Solve for x
x = 9,744.24/84.60 - Step 6: Final answer
x = 115.18
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.