Finding the Fourth Proportional to 77.18, 115.60 and 60.82
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Solution
The fourth proportional to 77.18, 115.60 and 60.82 is: 91.09
Step by Step Solution
- Step 1: Write the proportion equation
77.18 : 115.60 = 60.82 : x - Step 2: Convert to fraction form
77.18/115.60 = 60.82/x - Step 3: Cross multiply
77.18x = 115.60 × 60.82 - Step 4: Simplify right side
77.18x = 7,030.06 - Step 5: Solve for x
x = 7,030.06/77.18 - Step 6: Final answer
x = 91.09
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.