Finding the Fourth Proportional to 129.51, 195.05 and 117.99
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Solution
The fourth proportional to 129.51, 195.05 and 117.99 is: 177.70
Step by Step Solution
- Step 1: Write the proportion equation
129.51 : 195.05 = 117.99 : x - Step 2: Convert to fraction form
129.51/195.05 = 117.99/x - Step 3: Cross multiply
129.51x = 195.05 × 117.99 - Step 4: Simplify right side
129.51x = 23,014.24 - Step 5: Solve for x
x = 23,014.24/129.51 - Step 6: Final answer
x = 177.70
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.