Finding the Fourth Proportional to 84.97, 117.19 and 69.40
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Solution
The fourth proportional to 84.97, 117.19 and 69.40 is: 95.72
Step by Step Solution
- Step 1: Write the proportion equation
84.97 : 117.19 = 69.40 : x - Step 2: Convert to fraction form
84.97/117.19 = 69.40/x - Step 3: Cross multiply
84.97x = 117.19 × 69.40 - Step 4: Simplify right side
84.97x = 8,133.29 - Step 5: Solve for x
x = 8,133.29/84.97 - Step 6: Final answer
x = 95.72
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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.