Finding the Fourth Proportional to 129.06, 178.14 and 79.92
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Solution
The fourth proportional to 129.06, 178.14 and 79.92 is: 110.31
Step by Step Solution
- Step 1: Write the proportion equation
129.06 : 178.14 = 79.92 : x - Step 2: Convert to fraction form
129.06/178.14 = 79.92/x - Step 3: Cross multiply
129.06x = 178.14 × 79.92 - Step 4: Simplify right side
129.06x = 14,236.95 - Step 5: Solve for x
x = 14,236.95/129.06 - Step 6: Final answer
x = 110.31
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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.