Finding the Fourth Proportional to 87,761.84, 121,113.64 and 53,769.68
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Solution
The fourth proportional to 87,761.84, 121,113.64 and 53,769.68 is: 74,203.57
Step by Step Solution
- Step 1: Write the proportion equation
87,761.84 : 121,113.64 = 53,769.68 : x - Step 2: Convert to fraction form
87,761.84/121,113.64 = 53,769.68/x - Step 3: Cross multiply
87,761.84x = 121,113.64 × 53,769.68 - Step 4: Simplify right side
87,761.84x = 6,512,241,666.44 - Step 5: Solve for x
x = 6,512,241,666.44/87,761.84 - Step 6: Final answer
x = 74,203.57
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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.