Finding the Fourth Proportional to 70.99, 97.90 and 63.79
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Solution
The fourth proportional to 70.99, 97.90 and 63.79 is: 87.97
Step by Step Solution
- Step 1: Write the proportion equation
70.99 : 97.90 = 63.79 : x - Step 2: Convert to fraction form
70.99/97.90 = 63.79/x - Step 3: Cross multiply
70.99x = 97.90 × 63.79 - Step 4: Simplify right side
70.99x = 6,245.04 - Step 5: Solve for x
x = 6,245.04/70.99 - Step 6: Final answer
x = 87.97
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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.