Finding the Fourth Proportional to 149,378.19, 206,139.24 and 81,395.75
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Solution
The fourth proportional to 149,378.19, 206,139.24 and 81,395.75 is: 112,324.69
Step by Step Solution
- Step 1: Write the proportion equation
149,378.19 : 206,139.24 = 81,395.75 : x - Step 2: Convert to fraction form
149,378.19/206,139.24 = 81,395.75/x - Step 3: Cross multiply
149,378.19x = 206,139.24 × 81,395.75 - Step 4: Simplify right side
149,378.19x = 16,778,859,366.41 - Step 5: Solve for x
x = 16,778,859,366.41/149,378.19 - Step 6: Final answer
x = 112,324.69
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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.