Finding the Fourth Proportional to 129.22, 193.80 and 47.99
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Solution
The fourth proportional to 129.22, 193.80 and 47.99 is: 71.98
Step by Step Solution
- Step 1: Write the proportion equation
129.22 : 193.80 = 47.99 : x - Step 2: Convert to fraction form
129.22/193.80 = 47.99/x - Step 3: Cross multiply
129.22x = 193.80 × 47.99 - Step 4: Simplify right side
129.22x = 9,301.13 - Step 5: Solve for x
x = 9,301.13/129.22 - Step 6: Final answer
x = 71.98
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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.