Finding the Fourth Proportional to 129.79, 179.12 and 88.43
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Solution
The fourth proportional to 129.79, 179.12 and 88.43 is: 122.03
Step by Step Solution
- Step 1: Write the proportion equation
129.79 : 179.12 = 88.43 : x - Step 2: Convert to fraction form
129.79/179.12 = 88.43/x - Step 3: Cross multiply
129.79x = 179.12 × 88.43 - Step 4: Simplify right side
129.79x = 15,838.24 - Step 5: Solve for x
x = 15,838.24/129.79 - Step 6: Final answer
x = 122.03
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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.