Finding the Fourth Proportional to 129.14, 193.80 and 57.08
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Solution
The fourth proportional to 129.14, 193.80 and 57.08 is: 85.66
Step by Step Solution
- Step 1: Write the proportion equation
129.14 : 193.80 = 57.08 : x - Step 2: Convert to fraction form
129.14/193.80 = 57.08/x - Step 3: Cross multiply
129.14x = 193.80 × 57.08 - Step 4: Simplify right side
129.14x = 11,062.10 - Step 5: Solve for x
x = 11,062.10/129.14 - Step 6: Final answer
x = 85.66
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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.