Finding the Fourth Proportional to 129.75, 178.92 and 93.02
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Solution
The fourth proportional to 129.75, 178.92 and 93.02 is: 128.26
Step by Step Solution
- Step 1: Write the proportion equation
129.75 : 178.92 = 93.02 : x - Step 2: Convert to fraction form
129.75/178.92 = 93.02/x - Step 3: Cross multiply
129.75x = 178.92 × 93.02 - Step 4: Simplify right side
129.75x = 16,642.24 - Step 5: Solve for x
x = 16,642.24/129.75 - Step 6: Final answer
x = 128.26
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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.