Finding the Fourth Proportional to 76.99, 115.49 and 48.09
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Solution
The fourth proportional to 76.99, 115.49 and 48.09 is: 72.14
Step by Step Solution
- Step 1: Write the proportion equation
76.99 : 115.49 = 48.09 : x - Step 2: Convert to fraction form
76.99/115.49 = 48.09/x - Step 3: Cross multiply
76.99x = 115.49 × 48.09 - Step 4: Simplify right side
76.99x = 5,553.91 - Step 5: Solve for x
x = 5,553.91/76.99 - Step 6: Final answer
x = 72.14
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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.