Finding the Fourth Proportional to 138,615.76, 206,920.99 and 121,800.57
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Solution
The fourth proportional to 138,615.76, 206,920.99 and 121,800.57 is: 181,819.83
Step by Step Solution
- Step 1: Write the proportion equation
138,615.76 : 206,920.99 = 121,800.57 : x - Step 2: Convert to fraction form
138,615.76/206,920.99 = 121,800.57/x - Step 3: Cross multiply
138,615.76x = 206,920.99 × 121,800.57 - Step 4: Simplify right side
138,615.76x = 25,203,094,526.96 - Step 5: Solve for x
x = 25,203,094,526.96/138,615.76 - Step 6: Final answer
x = 181,819.83
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.