Finding the Fourth Proportional to 138,977.64, 208,448.01 and 39,145.68
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Solution
The fourth proportional to 138,977.64, 208,448.01 and 39,145.68 is: 58,713.32
Step by Step Solution
- Step 1: Write the proportion equation
138,977.64 : 208,448.01 = 39,145.68 : x - Step 2: Convert to fraction form
138,977.64/208,448.01 = 39,145.68/x - Step 3: Cross multiply
138,977.64x = 208,448.01 × 39,145.68 - Step 4: Simplify right side
138,977.64x = 8,159,839,096.10 - Step 5: Solve for x
x = 8,159,839,096.10/138,977.64 - Step 6: Final answer
x = 58,713.32
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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.