Finding the Fourth Proportional to 155,138.40, 214,090.62 and 87,157.26
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Solution
The fourth proportional to 155,138.40, 214,090.62 and 87,157.26 is: 120,276.81
Step by Step Solution
- Step 1: Write the proportion equation
155,138.40 : 214,090.62 = 87,157.26 : x - Step 2: Convert to fraction form
155,138.40/214,090.62 = 87,157.26/x - Step 3: Cross multiply
155,138.40x = 214,090.62 × 87,157.26 - Step 4: Simplify right side
155,138.40x = 18,659,551,830.90 - Step 5: Solve for x
x = 18,659,551,830.90/155,138.40 - Step 6: Final answer
x = 120,276.81
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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.