Finding the Fourth Proportional to 129.24, 193.79 and 47.99
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Solution
The fourth proportional to 129.24, 193.79 and 47.99 is: 71.96
Step by Step Solution
- Step 1: Write the proportion equation
129.24 : 193.79 = 47.99 : x - Step 2: Convert to fraction form
129.24/193.79 = 47.99/x - Step 3: Cross multiply
129.24x = 193.79 × 47.99 - Step 4: Simplify right side
129.24x = 9,299.86 - Step 5: Solve for x
x = 9,299.86/129.24 - Step 6: Final answer
x = 71.96
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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.