Finding the Fourth Proportional to 86.27, 118.87 and 65.31
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Solution
The fourth proportional to 86.27, 118.87 and 65.31 is: 89.99
Step by Step Solution
- Step 1: Write the proportion equation
86.27 : 118.87 = 65.31 : x - Step 2: Convert to fraction form
86.27/118.87 = 65.31/x - Step 3: Cross multiply
86.27x = 118.87 × 65.31 - Step 4: Simplify right side
86.27x = 7,762.79 - Step 5: Solve for x
x = 7,762.79/86.27 - Step 6: Final answer
x = 89.99
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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.