Finding the Fourth Proportional to 81,138.71, 121,708.05 and 33,752.90
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Solution
The fourth proportional to 81,138.71, 121,708.05 and 33,752.90 is: 50,629.35
Step by Step Solution
- Step 1: Write the proportion equation
81,138.71 : 121,708.05 = 33,752.90 : x - Step 2: Convert to fraction form
81,138.71/121,708.05 = 33,752.90/x - Step 3: Cross multiply
81,138.71x = 121,708.05 × 33,752.90 - Step 4: Simplify right side
81,138.71x = 4,108,000,008.40 - Step 5: Solve for x
x = 4,108,000,008.40/81,138.71 - Step 6: Final answer
x = 50,629.35
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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.