Finding the Fourth Proportional to 135.70, 202.57 and 115.20
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Solution
The fourth proportional to 135.70, 202.57 and 115.20 is: 171.97
Step by Step Solution
- Step 1: Write the proportion equation
135.70 : 202.57 = 115.20 : x - Step 2: Convert to fraction form
135.70/202.57 = 115.20/x - Step 3: Cross multiply
135.70x = 202.57 × 115.20 - Step 4: Simplify right side
135.70x = 23,335.78 - Step 5: Solve for x
x = 23,335.78/135.70 - Step 6: Final answer
x = 171.97
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.