Finding the Fourth Proportional to 138,163.13, 190,665.11 and 78,547.13
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Solution
The fourth proportional to 138,163.13, 190,665.11 and 78,547.13 is: 108,395.03
Step by Step Solution
- Step 1: Write the proportion equation
138,163.13 : 190,665.11 = 78,547.13 : x - Step 2: Convert to fraction form
138,163.13/190,665.11 = 78,547.13/x - Step 3: Cross multiply
138,163.13x = 190,665.11 × 78,547.13 - Step 4: Simplify right side
138,163.13x = 14,976,196,424.68 - Step 5: Solve for x
x = 14,976,196,424.68/138,163.13 - Step 6: Final answer
x = 108,395.03
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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.