Finding the Fourth Proportional to 137,769.27, 190,130.09 and 91,749.99
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Solution
The fourth proportional to 137,769.27, 190,130.09 and 91,749.99 is: 126,620.65
Step by Step Solution
- Step 1: Write the proportion equation
137,769.27 : 190,130.09 = 91,749.99 : x - Step 2: Convert to fraction form
137,769.27/190,130.09 = 91,749.99/x - Step 3: Cross multiply
137,769.27x = 190,130.09 × 91,749.99 - Step 4: Simplify right side
137,769.27x = 17,444,433,856.20 - Step 5: Solve for x
x = 17,444,433,856.20/137,769.27 - Step 6: Final answer
x = 126,620.65
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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.