Finding the Fourth Proportional to 129.06, 177.66 and 107.19
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Solution
The fourth proportional to 129.06, 177.66 and 107.19 is: 147.55
Step by Step Solution
- Step 1: Write the proportion equation
129.06 : 177.66 = 107.19 : x - Step 2: Convert to fraction form
129.06/177.66 = 107.19/x - Step 3: Cross multiply
129.06x = 177.66 × 107.19 - Step 4: Simplify right side
129.06x = 19,043.38 - Step 5: Solve for x
x = 19,043.38/129.06 - Step 6: Final answer
x = 147.55
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.