Finding the Fourth Proportional to 135,447.24, 186,918.56 and 81,721.86
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Solution
The fourth proportional to 135,447.24, 186,918.56 and 81,721.86 is: 112,776.99
Step by Step Solution
- Step 1: Write the proportion equation
135,447.24 : 186,918.56 = 81,721.86 : x - Step 2: Convert to fraction form
135,447.24/186,918.56 = 81,721.86/x - Step 3: Cross multiply
135,447.24x = 186,918.56 × 81,721.86 - Step 4: Simplify right side
135,447.24x = 15,275,332,391.72 - Step 5: Solve for x
x = 15,275,332,391.72/135,447.24 - Step 6: Final answer
x = 112,776.99
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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.