Finding the Fourth Proportional to 145.74, 201.14 and 121.14
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Solution
The fourth proportional to 145.74, 201.14 and 121.14 is: 167.19
Step by Step Solution
- Step 1: Write the proportion equation
145.74 : 201.14 = 121.14 : x - Step 2: Convert to fraction form
145.74/201.14 = 121.14/x - Step 3: Cross multiply
145.74x = 201.14 × 121.14 - Step 4: Simplify right side
145.74x = 24,366.40 - Step 5: Solve for x
x = 24,366.40/145.74 - Step 6: Final answer
x = 167.19
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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.