Finding the Fourth Proportional to 129.11, 178.16 and 73.84
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Solution
The fourth proportional to 129.11, 178.16 and 73.84 is: 101.89
Step by Step Solution
- Step 1: Write the proportion equation
129.11 : 178.16 = 73.84 : x - Step 2: Convert to fraction form
129.11/178.16 = 73.84/x - Step 3: Cross multiply
129.11x = 178.16 × 73.84 - Step 4: Simplify right side
129.11x = 13,154.44 - Step 5: Solve for x
x = 13,154.44/129.11 - Step 6: Final answer
x = 101.89
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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.