Finding the Fourth Proportional to 128,736.56, 177,656.43 and 71,375.70
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Solution
The fourth proportional to 128,736.56, 177,656.43 and 71,375.70 is: 98,498.45
Step by Step Solution
- Step 1: Write the proportion equation
128,736.56 : 177,656.43 = 71,375.70 : x - Step 2: Convert to fraction form
128,736.56/177,656.43 = 71,375.70/x - Step 3: Cross multiply
128,736.56x = 177,656.43 × 71,375.70 - Step 4: Simplify right side
128,736.56x = 12,680,352,449.30 - Step 5: Solve for x
x = 12,680,352,449.30/128,736.56 - Step 6: Final answer
x = 98,498.45
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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.