Finding the Fourth Proportional to 138,412.20, 207,272.70 and 91,410.60
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Solution
The fourth proportional to 138,412.20, 207,272.70 and 91,410.60 is: 136,887.66
Step by Step Solution
- Step 1: Write the proportion equation
138,412.20 : 207,272.70 = 91,410.60 : x - Step 2: Convert to fraction form
138,412.20/207,272.70 = 91,410.60/x - Step 3: Cross multiply
138,412.20x = 207,272.70 × 91,410.60 - Step 4: Simplify right side
138,412.20x = 18,946,921,870.62 - Step 5: Solve for x
x = 18,946,921,870.62/138,412.20 - Step 6: Final answer
x = 136,887.66
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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.