Finding the Fourth Proportional to 135,635.81, 187,216.40 and 81,911.75
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Solution
The fourth proportional to 135,635.81, 187,216.40 and 81,911.75 is: 113,061.75
Step by Step Solution
- Step 1: Write the proportion equation
135,635.81 : 187,216.40 = 81,911.75 : x - Step 2: Convert to fraction form
135,635.81/187,216.40 = 81,911.75/x - Step 3: Cross multiply
135,635.81x = 187,216.40 × 81,911.75 - Step 4: Simplify right side
135,635.81x = 15,335,222,543.14 - Step 5: Solve for x
x = 15,335,222,543.14/135,635.81 - Step 6: Final answer
x = 113,061.75
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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.