Finding the Fourth Proportional to 129.87, 179.08 and 106.21
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Solution
The fourth proportional to 129.87, 179.08 and 106.21 is: 146.45
Step by Step Solution
- Step 1: Write the proportion equation
129.87 : 179.08 = 106.21 : x - Step 2: Convert to fraction form
129.87/179.08 = 106.21/x - Step 3: Cross multiply
129.87x = 179.08 × 106.21 - Step 4: Simplify right side
129.87x = 19,020.05 - Step 5: Solve for x
x = 19,020.05/129.87 - Step 6: Final answer
x = 146.45
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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.