Finding the Fourth Proportional to 129,619.74, 178,862.68 and 77,951.87
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Solution
The fourth proportional to 129,619.74, 178,862.68 and 77,951.87 is: 107,566.02
Step by Step Solution
- Step 1: Write the proportion equation
129,619.74 : 178,862.68 = 77,951.87 : x - Step 2: Convert to fraction form
129,619.74/178,862.68 = 77,951.87/x - Step 3: Cross multiply
129,619.74x = 178,862.68 × 77,951.87 - Step 4: Simplify right side
129,619.74x = 13,942,680,253.07 - Step 5: Solve for x
x = 13,942,680,253.07/129,619.74 - Step 6: Final answer
x = 107,566.02
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.