Finding the Fourth Proportional to 115.25, 159.09 and 70.99
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Solution
The fourth proportional to 115.25, 159.09 and 70.99 is: 97.99
Step by Step Solution
- Step 1: Write the proportion equation
115.25 : 159.09 = 70.99 : x - Step 2: Convert to fraction form
115.25/159.09 = 70.99/x - Step 3: Cross multiply
115.25x = 159.09 × 70.99 - Step 4: Simplify right side
115.25x = 11,293.80 - Step 5: Solve for x
x = 11,293.80/115.25 - Step 6: Final answer
x = 97.99
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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.