Finding the Fourth Proportional to 77.99, 116.97 and 74.65
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Solution
The fourth proportional to 77.99, 116.97 and 74.65 is: 111.96
Step by Step Solution
- Step 1: Write the proportion equation
77.99 : 116.97 = 74.65 : x - Step 2: Convert to fraction form
77.99/116.97 = 74.65/x - Step 3: Cross multiply
77.99x = 116.97 × 74.65 - Step 4: Simplify right side
77.99x = 8,731.23 - Step 5: Solve for x
x = 8,731.23/77.99 - Step 6: Final answer
x = 111.96
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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.