Finding the Fourth Proportional to 129.79, 194.70 and 47.55
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Solution
The fourth proportional to 129.79, 194.70 and 47.55 is: 71.33
Step by Step Solution
- Step 1: Write the proportion equation
129.79 : 194.70 = 47.55 : x - Step 2: Convert to fraction form
129.79/194.70 = 47.55/x - Step 3: Cross multiply
129.79x = 194.70 × 47.55 - Step 4: Simplify right side
129.79x = 9,257.99 - Step 5: Solve for x
x = 9,257.99/129.79 - Step 6: Final answer
x = 71.33
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.