Finding the Fourth Proportional to 121,258.87, 181,913.51 and 51,138.79
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Solution
The fourth proportional to 121,258.87, 181,913.51 and 51,138.79 is: 76,718.81
Step by Step Solution
- Step 1: Write the proportion equation
121,258.87 : 181,913.51 = 51,138.79 : x - Step 2: Convert to fraction form
121,258.87/181,913.51 = 51,138.79/x - Step 3: Cross multiply
121,258.87x = 181,913.51 × 51,138.79 - Step 4: Simplify right side
121,258.87x = 9,302,836,786.05 - Step 5: Solve for x
x = 9,302,836,786.05/121,258.87 - Step 6: Final answer
x = 76,718.81
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.