Finding the Fourth Proportional to 129.74, 179.08 and 88.28
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Solution
The fourth proportional to 129.74, 179.08 and 88.28 is: 121.85
Step by Step Solution
- Step 1: Write the proportion equation
129.74 : 179.08 = 88.28 : x - Step 2: Convert to fraction form
129.74/179.08 = 88.28/x - Step 3: Cross multiply
129.74x = 179.08 × 88.28 - Step 4: Simplify right side
129.74x = 15,809.18 - Step 5: Solve for x
x = 15,809.18/129.74 - Step 6: Final answer
x = 121.85
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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.