Finding the Fourth Proportional to 87,921.32, 121,331.49 and 51,615.66
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Solution
The fourth proportional to 87,921.32, 121,331.49 and 51,615.66 is: 71,229.65
Step by Step Solution
- Step 1: Write the proportion equation
87,921.32 : 121,331.49 = 51,615.66 : x - Step 2: Convert to fraction form
87,921.32/121,331.49 = 51,615.66/x - Step 3: Cross multiply
87,921.32x = 121,331.49 × 51,615.66 - Step 4: Simplify right side
87,921.32x = 6,262,604,935.13 - Step 5: Solve for x
x = 6,262,604,935.13/87,921.32 - Step 6: Final answer
x = 71,229.65
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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.