Finding the Fourth Proportional to 201,988.71, 278,731.90 and 111,339.99
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Solution
The fourth proportional to 201,988.71, 278,731.90 and 111,339.99 is: 153,642.29
Step by Step Solution
- Step 1: Write the proportion equation
201,988.71 : 278,731.90 = 111,339.99 : x - Step 2: Convert to fraction form
201,988.71/278,731.90 = 111,339.99/x - Step 3: Cross multiply
201,988.71x = 278,731.90 × 111,339.99 - Step 4: Simplify right side
201,988.71x = 31,034,006,958.68 - Step 5: Solve for x
x = 31,034,006,958.68/201,988.71 - Step 6: Final answer
x = 153,642.29
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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.