Finding the Fourth Proportional to 135.78, 202.26 and 129.12
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Solution
The fourth proportional to 135.78, 202.26 and 129.12 is: 192.34
Step by Step Solution
- Step 1: Write the proportion equation
135.78 : 202.26 = 129.12 : x - Step 2: Convert to fraction form
135.78/202.26 = 129.12/x - Step 3: Cross multiply
135.78x = 202.26 × 129.12 - Step 4: Simplify right side
135.78x = 26,115.81 - Step 5: Solve for x
x = 26,115.81/135.78 - Step 6: Final answer
x = 192.34
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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.