Finding the Fourth Proportional to 128,818.67, 177,771.60 and 77,824.31
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Solution
The fourth proportional to 128,818.67, 177,771.60 and 77,824.31 is: 107,398.65
Step by Step Solution
- Step 1: Write the proportion equation
128,818.67 : 177,771.60 = 77,824.31 : x - Step 2: Convert to fraction form
128,818.67/177,771.60 = 77,824.31/x - Step 3: Cross multiply
128,818.67x = 177,771.60 × 77,824.31 - Step 4: Simplify right side
128,818.67x = 13,834,951,218.74 - Step 5: Solve for x
x = 13,834,951,218.74/128,818.67 - Step 6: Final answer
x = 107,398.65
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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.