Finding the Fourth Proportional to 129.99, 194.99 and 69.17
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Solution
The fourth proportional to 129.99, 194.99 and 69.17 is: 103.75
Step by Step Solution
- Step 1: Write the proportion equation
129.99 : 194.99 = 69.17 : x - Step 2: Convert to fraction form
129.99/194.99 = 69.17/x - Step 3: Cross multiply
129.99x = 194.99 × 69.17 - Step 4: Simplify right side
129.99x = 13,486.14 - Step 5: Solve for x
x = 13,486.14/129.99 - Step 6: Final answer
x = 103.75
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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.