Finding the Fourth Proportional to 128,688.68, 177,596.93 and 71,334.09
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Solution
The fourth proportional to 128,688.68, 177,596.93 and 71,334.09 is: 98,444.68
Step by Step Solution
- Step 1: Write the proportion equation
128,688.68 : 177,596.93 = 71,334.09 : x - Step 2: Convert to fraction form
128,688.68/177,596.93 = 71,334.09/x - Step 3: Cross multiply
128,688.68x = 177,596.93 × 71,334.09 - Step 4: Simplify right side
128,688.68x = 12,668,715,566.68 - Step 5: Solve for x
x = 12,668,715,566.68/128,688.68 - Step 6: Final answer
x = 98,444.68
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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.