Finding the Fourth Proportional to 70.85, 97.70 and 66.99
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Solution
The fourth proportional to 70.85, 97.70 and 66.99 is: 92.38
Step by Step Solution
- Step 1: Write the proportion equation
70.85 : 97.70 = 66.99 : x - Step 2: Convert to fraction form
70.85/97.70 = 66.99/x - Step 3: Cross multiply
70.85x = 97.70 × 66.99 - Step 4: Simplify right side
70.85x = 6,544.59 - Step 5: Solve for x
x = 6,544.59/70.85 - Step 6: Final answer
x = 92.38
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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.