Finding the Fourth Proportional to 150,642.13, 207,904.59 and 86,979.79
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Solution
The fourth proportional to 150,642.13, 207,904.59 and 86,979.79 is: 120,042.76
Step by Step Solution
- Step 1: Write the proportion equation
150,642.13 : 207,904.59 = 86,979.79 : x - Step 2: Convert to fraction form
150,642.13/207,904.59 = 86,979.79/x - Step 3: Cross multiply
150,642.13x = 207,904.59 × 86,979.79 - Step 4: Simplify right side
150,642.13x = 18,083,497,578.24 - Step 5: Solve for x
x = 18,083,497,578.24/150,642.13 - Step 6: Final answer
x = 120,042.76
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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.