Finding the Fourth Proportional to 138,656.80, 207,985.20 and 122,327.20
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Solution
The fourth proportional to 138,656.80, 207,985.20 and 122,327.20 is: 183,490.80
Step by Step Solution
- Step 1: Write the proportion equation
138,656.80 : 207,985.20 = 122,327.20 : x - Step 2: Convert to fraction form
138,656.80/207,985.20 = 122,327.20/x - Step 3: Cross multiply
138,656.80x = 207,985.20 × 122,327.20 - Step 4: Simplify right side
138,656.80x = 25,442,247,157.44 - Step 5: Solve for x
x = 25,442,247,157.44/138,656.80 - Step 6: Final answer
x = 183,490.80
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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.