Finding the Fourth Proportional to 84.99, 126.73 and 79.21
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Solution
The fourth proportional to 84.99, 126.73 and 79.21 is: 118.11
Step by Step Solution
- Step 1: Write the proportion equation
84.99 : 126.73 = 79.21 : x - Step 2: Convert to fraction form
84.99/126.73 = 79.21/x - Step 3: Cross multiply
84.99x = 126.73 × 79.21 - Step 4: Simplify right side
84.99x = 10,038.28 - Step 5: Solve for x
x = 10,038.28/84.99 - Step 6: Final answer
x = 118.11
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.