Finding the Fourth Proportional to 135.74, 203.79 and 70.79
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Solution
The fourth proportional to 135.74, 203.79 and 70.79 is: 106.28
Step by Step Solution
- Step 1: Write the proportion equation
135.74 : 203.79 = 70.79 : x - Step 2: Convert to fraction form
135.74/203.79 = 70.79/x - Step 3: Cross multiply
135.74x = 203.79 × 70.79 - Step 4: Simplify right side
135.74x = 14,425.54 - Step 5: Solve for x
x = 14,425.54/135.74 - Step 6: Final answer
x = 106.28
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.