Finding the Fourth Proportional to 128,313.40, 177,072.66 and 71,724.68
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Solution
The fourth proportional to 128,313.40, 177,072.66 and 71,724.68 is: 98,980.15
Step by Step Solution
- Step 1: Write the proportion equation
128,313.40 : 177,072.66 = 71,724.68 : x - Step 2: Convert to fraction form
128,313.40/177,072.66 = 71,724.68/x - Step 3: Cross multiply
128,313.40x = 177,072.66 × 71,724.68 - Step 4: Simplify right side
128,313.40x = 12,700,479,875.25 - Step 5: Solve for x
x = 12,700,479,875.25/128,313.40 - Step 6: Final answer
x = 98,980.15
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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.