Finding the Fourth Proportional to 137.74, 189.99 and 88.68
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Solution
The fourth proportional to 137.74, 189.99 and 88.68 is: 122.32
Step by Step Solution
- Step 1: Write the proportion equation
137.74 : 189.99 = 88.68 : x - Step 2: Convert to fraction form
137.74/189.99 = 88.68/x - Step 3: Cross multiply
137.74x = 189.99 × 88.68 - Step 4: Simplify right side
137.74x = 16,848.31 - Step 5: Solve for x
x = 16,848.31/137.74 - Step 6: Final answer
x = 122.32
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.