Finding the Fourth Proportional to 128.84, 177.99 and 94.05
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Solution
The fourth proportional to 128.84, 177.99 and 94.05 is: 129.93
Step by Step Solution
- Step 1: Write the proportion equation
128.84 : 177.99 = 94.05 : x - Step 2: Convert to fraction form
128.84/177.99 = 94.05/x - Step 3: Cross multiply
128.84x = 177.99 × 94.05 - Step 4: Simplify right side
128.84x = 16,739.96 - Step 5: Solve for x
x = 16,739.96/128.84 - Step 6: Final answer
x = 129.93
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.