Finding the Fourth Proportional to 129.79, 194.71 and 71.99
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Solution
The fourth proportional to 129.79, 194.71 and 71.99 is: 108.00
Step by Step Solution
- Step 1: Write the proportion equation
129.79 : 194.71 = 71.99 : x - Step 2: Convert to fraction form
129.79/194.71 = 71.99/x - Step 3: Cross multiply
129.79x = 194.71 × 71.99 - Step 4: Simplify right side
129.79x = 14,017.17 - Step 5: Solve for x
x = 14,017.17/129.79 - Step 6: Final answer
x = 108.00
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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.