Finding the Fourth Proportional to 135.12, 202.72 and 53.99
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Solution
The fourth proportional to 135.12, 202.72 and 53.99 is: 81.00
Step by Step Solution
- Step 1: Write the proportion equation
135.12 : 202.72 = 53.99 : x - Step 2: Convert to fraction form
135.12/202.72 = 53.99/x - Step 3: Cross multiply
135.12x = 202.72 × 53.99 - Step 4: Simplify right side
135.12x = 10,944.85 - Step 5: Solve for x
x = 10,944.85/135.12 - Step 6: Final answer
x = 81.00
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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.