Finding the Fourth Proportional to 128,924.30, 177,912.74 and 71,560.26
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Solution
The fourth proportional to 128,924.30, 177,912.74 and 71,560.26 is: 98,751.61
Step by Step Solution
- Step 1: Write the proportion equation
128,924.30 : 177,912.74 = 71,560.26 : x - Step 2: Convert to fraction form
128,924.30/177,912.74 = 71,560.26/x - Step 3: Cross multiply
128,924.30x = 177,912.74 × 71,560.26 - Step 4: Simplify right side
128,924.30x = 12,731,482,110.61 - Step 5: Solve for x
x = 12,731,482,110.61/128,924.30 - Step 6: Final answer
x = 98,751.61
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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.