Finding the Fourth Proportional to 138,119.24, 207,178.86 and 91,361.18
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Solution
The fourth proportional to 138,119.24, 207,178.86 and 91,361.18 is: 137,041.77
Step by Step Solution
- Step 1: Write the proportion equation
138,119.24 : 207,178.86 = 91,361.18 : x - Step 2: Convert to fraction form
138,119.24/207,178.86 = 91,361.18/x - Step 3: Cross multiply
138,119.24x = 207,178.86 × 91,361.18 - Step 4: Simplify right side
138,119.24x = 18,928,105,981.21 - Step 5: Solve for x
x = 18,928,105,981.21/138,119.24 - Step 6: Final answer
x = 137,041.77
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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.