Finding the Fourth Proportional to 129.99, 194.99 and 47.74
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Solution
The fourth proportional to 129.99, 194.99 and 47.74 is: 71.60
Step by Step Solution
- Step 1: Write the proportion equation
129.99 : 194.99 = 47.74 : x - Step 2: Convert to fraction form
129.99/194.99 = 47.74/x - Step 3: Cross multiply
129.99x = 194.99 × 47.74 - Step 4: Simplify right side
129.99x = 9,307.86 - Step 5: Solve for x
x = 9,307.86/129.99 - Step 6: Final answer
x = 71.60
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.