Finding the Fourth Proportional to 145.80, 201.08 and 121.20
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Solution
The fourth proportional to 145.80, 201.08 and 121.20 is: 167.15
Step by Step Solution
- Step 1: Write the proportion equation
145.80 : 201.08 = 121.20 : x - Step 2: Convert to fraction form
145.80/201.08 = 121.20/x - Step 3: Cross multiply
145.80x = 201.08 × 121.20 - Step 4: Simplify right side
145.80x = 24,370.29 - Step 5: Solve for x
x = 24,370.29/145.80 - Step 6: Final answer
x = 167.15
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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.