Finding the Fourth Proportional to 77.36, 115.98 and 74.99
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Solution
The fourth proportional to 77.36, 115.98 and 74.99 is: 112.43
Step by Step Solution
- Step 1: Write the proportion equation
77.36 : 115.98 = 74.99 : x - Step 2: Convert to fraction form
77.36/115.98 = 74.99/x - Step 3: Cross multiply
77.36x = 115.98 × 74.99 - Step 4: Simplify right side
77.36x = 8,696.76 - Step 5: Solve for x
x = 8,696.76/77.36 - Step 6: Final answer
x = 112.43
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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.