Finding the Fourth Proportional to 84.84, 117.10 and 79.63
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Solution
The fourth proportional to 84.84, 117.10 and 79.63 is: 109.90
Step by Step Solution
- Step 1: Write the proportion equation
84.84 : 117.10 = 79.63 : x - Step 2: Convert to fraction form
84.84/117.10 = 79.63/x - Step 3: Cross multiply
84.84x = 117.10 × 79.63 - Step 4: Simplify right side
84.84x = 9,324.27 - Step 5: Solve for x
x = 9,324.27/84.84 - Step 6: Final answer
x = 109.90
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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.