Finding the Fourth Proportional to 129.99, 195.19 and 69.19
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Solution
The fourth proportional to 129.99, 195.19 and 69.19 is: 103.89
Step by Step Solution
- Step 1: Write the proportion equation
129.99 : 195.19 = 69.19 : x - Step 2: Convert to fraction form
129.99/195.19 = 69.19/x - Step 3: Cross multiply
129.99x = 195.19 × 69.19 - Step 4: Simplify right side
129.99x = 13,505.20 - Step 5: Solve for x
x = 13,505.20/129.99 - Step 6: Final answer
x = 103.89
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.