Finding the Fourth Proportional to 84.70, 116.79 and 73.09
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Solution
The fourth proportional to 84.70, 116.79 and 73.09 is: 100.78
Step by Step Solution
- Step 1: Write the proportion equation
84.70 : 116.79 = 73.09 : x - Step 2: Convert to fraction form
84.70/116.79 = 73.09/x - Step 3: Cross multiply
84.70x = 116.79 × 73.09 - Step 4: Simplify right side
84.70x = 8,536.18 - Step 5: Solve for x
x = 8,536.18/84.70 - Step 6: Final answer
x = 100.78
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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.