Finding the Fourth Proportional to 138,435.48, 207,351.62 and 90,997.02
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Solution
The fourth proportional to 138,435.48, 207,351.62 and 90,997.02 is: 136,297.28
Step by Step Solution
- Step 1: Write the proportion equation
138,435.48 : 207,351.62 = 90,997.02 : x - Step 2: Convert to fraction form
138,435.48/207,351.62 = 90,997.02/x - Step 3: Cross multiply
138,435.48x = 207,351.62 × 90,997.02 - Step 4: Simplify right side
138,435.48x = 18,868,379,512.17 - Step 5: Solve for x
x = 18,868,379,512.17/138,435.48 - Step 6: Final answer
x = 136,297.28
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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.