Finding the Fourth Proportional to 87,958.68, 121,338.36 and 55,638.84
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Solution
The fourth proportional to 87,958.68, 121,338.36 and 55,638.84 is: 76,753.38
Step by Step Solution
- Step 1: Write the proportion equation
87,958.68 : 121,338.36 = 55,638.84 : x - Step 2: Convert to fraction form
87,958.68/121,338.36 = 55,638.84/x - Step 3: Cross multiply
87,958.68x = 121,338.36 × 55,638.84 - Step 4: Simplify right side
87,958.68x = 6,751,125,597.90 - Step 5: Solve for x
x = 6,751,125,597.90/87,958.68 - Step 6: Final answer
x = 76,753.38
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1.5x scale
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.