Finding the Fourth Proportional to 138,971.18, 208,735.74 and 82,920.68
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Solution
The fourth proportional to 138,971.18, 208,735.74 and 82,920.68 is: 124,547.47
Step by Step Solution
- Step 1: Write the proportion equation
138,971.18 : 208,735.74 = 82,920.68 : x - Step 2: Convert to fraction form
138,971.18/208,735.74 = 82,920.68/x - Step 3: Cross multiply
138,971.18x = 208,735.74 × 82,920.68 - Step 4: Simplify right side
138,971.18x = 17,308,509,501.10 - Step 5: Solve for x
x = 17,308,509,501.10/138,971.18 - Step 6: Final answer
x = 124,547.47
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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.