Finding the Fourth Proportional to 87,972.85, 121,340.32 and 53,983.09
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Solution
The fourth proportional to 87,972.85, 121,340.32 and 53,983.09 is: 74,458.49
Step by Step Solution
- Step 1: Write the proportion equation
87,972.85 : 121,340.32 = 53,983.09 : x - Step 2: Convert to fraction form
87,972.85/121,340.32 = 53,983.09/x - Step 3: Cross multiply
87,972.85x = 121,340.32 × 53,983.09 - Step 4: Simplify right side
87,972.85x = 6,550,325,415.19 - Step 5: Solve for x
x = 6,550,325,415.19/87,972.85 - Step 6: Final answer
x = 74,458.49
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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.