Finding the Fourth Proportional to 155.93, 214.99 and 129.74
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Solution
The fourth proportional to 155.93, 214.99 and 129.74 is: 178.88
Step by Step Solution
- Step 1: Write the proportion equation
155.93 : 214.99 = 129.74 : x - Step 2: Convert to fraction form
155.93/214.99 = 129.74/x - Step 3: Cross multiply
155.93x = 214.99 × 129.74 - Step 4: Simplify right side
155.93x = 27,891.40 - Step 5: Solve for x
x = 27,891.40/155.93 - Step 6: Final answer
x = 178.88
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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.