Finding the Fourth Proportional to 105,812.40, 158,339.64 and 91,629.99
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Solution
The fourth proportional to 105,812.40, 158,339.64 and 91,629.99 is: 137,116.82
Step by Step Solution
- Step 1: Write the proportion equation
105,812.40 : 158,339.64 = 91,629.99 : x - Step 2: Convert to fraction form
105,812.40/158,339.64 = 91,629.99/x - Step 3: Cross multiply
105,812.40x = 158,339.64 × 91,629.99 - Step 4: Simplify right side
105,812.40x = 14,508,659,629.80 - Step 5: Solve for x
x = 14,508,659,629.80/105,812.40 - Step 6: Final answer
x = 137,116.82
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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.