Finding the Fourth Proportional to 129.84, 194.81 and 68.95
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Solution
The fourth proportional to 129.84, 194.81 and 68.95 is: 103.45
Step by Step Solution
- Step 1: Write the proportion equation
129.84 : 194.81 = 68.95 : x - Step 2: Convert to fraction form
129.84/194.81 = 68.95/x - Step 3: Cross multiply
129.84x = 194.81 × 68.95 - Step 4: Simplify right side
129.84x = 13,432.05 - Step 5: Solve for x
x = 13,432.05/129.84 - Step 6: Final answer
x = 103.45
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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.