Finding the Fourth Proportional to 135.46, 202.95 and 81.23
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Solution
The fourth proportional to 135.46, 202.95 and 81.23 is: 121.71
Step by Step Solution
- Step 1: Write the proportion equation
135.46 : 202.95 = 81.23 : x - Step 2: Convert to fraction form
135.46/202.95 = 81.23/x - Step 3: Cross multiply
135.46x = 202.95 × 81.23 - Step 4: Simplify right side
135.46x = 16,486.14 - Step 5: Solve for x
x = 16,486.14/135.46 - Step 6: Final answer
x = 121.71
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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.