Finding the Fourth Proportional to 76.49, 105.50 and 60.09
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Solution
The fourth proportional to 76.49, 105.50 and 60.09 is: 82.88
Step by Step Solution
- Step 1: Write the proportion equation
76.49 : 105.50 = 60.09 : x - Step 2: Convert to fraction form
76.49/105.50 = 60.09/x - Step 3: Cross multiply
76.49x = 105.50 × 60.09 - Step 4: Simplify right side
76.49x = 6,339.25 - Step 5: Solve for x
x = 6,339.25/76.49 - Step 6: Final answer
x = 82.88
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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.