Finding the Fourth Proportional to 129,128.31, 193,695.92 and 40,381.81
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Solution
The fourth proportional to 129,128.31, 193,695.92 and 40,381.81 is: 60,573.80
Step by Step Solution
- Step 1: Write the proportion equation
129,128.31 : 193,695.92 = 40,381.81 : x - Step 2: Convert to fraction form
129,128.31/193,695.92 = 40,381.81/x - Step 3: Cross multiply
129,128.31x = 193,695.92 × 40,381.81 - Step 4: Simplify right side
129,128.31x = 7,821,792,621.19 - Step 5: Solve for x
x = 7,821,792,621.19/129,128.31 - Step 6: Final answer
x = 60,573.80
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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.