Finding the Fourth Proportional to 143,979.23, 198,689.99 and 79,449.07
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Solution
The fourth proportional to 143,979.23, 198,689.99 and 79,449.07 is: 109,638.97
Step by Step Solution
- Step 1: Write the proportion equation
143,979.23 : 198,689.99 = 79,449.07 : x - Step 2: Convert to fraction form
143,979.23/198,689.99 = 79,449.07/x - Step 3: Cross multiply
143,979.23x = 198,689.99 × 79,449.07 - Step 4: Simplify right side
143,979.23x = 15,785,733,930.36 - Step 5: Solve for x
x = 15,785,733,930.36/143,979.23 - Step 6: Final answer
x = 109,638.97
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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.