Finding the Fourth Proportional to 135.25, 202.87 and 87.19
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Solution
The fourth proportional to 135.25, 202.87 and 87.19 is: 130.78
Step by Step Solution
- Step 1: Write the proportion equation
135.25 : 202.87 = 87.19 : x - Step 2: Convert to fraction form
135.25/202.87 = 87.19/x - Step 3: Cross multiply
135.25x = 202.87 × 87.19 - Step 4: Simplify right side
135.25x = 17,688.24 - Step 5: Solve for x
x = 17,688.24/135.25 - Step 6: Final answer
x = 130.78
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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.