Finding the Third Proportional to 72 and 84.50
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Solution
The third proportional to 72 and 84.50 is: 99.17
Step by Step Solution
- Step 1: Write the proportion equation
72 : 84.50 = 84.50 : x - Step 2: Convert to fraction form
72/84.50 = 84.50/x - Step 3: Cross multiply
72x = 84.50 × 84.50 - Step 4: Simplify right side
72x = 7,140.25 - Step 5: Solve for x
x = 7,140.25/72 - Step 6: Final answer
x = 99.17
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Why These Related Problems?
These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.