Finding the Fourth Proportional to 75,135.49, 112,703.20 and 18,978.93
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Solution
The fourth proportional to 75,135.49, 112,703.20 and 18,978.93 is: 28,468.39
Step by Step Solution
- Step 1: Write the proportion equation
75,135.49 : 112,703.20 = 18,978.93 : x - Step 2: Convert to fraction form
75,135.49/112,703.20 = 18,978.93/x - Step 3: Cross multiply
75,135.49x = 112,703.20 × 18,978.93 - Step 4: Simplify right side
75,135.49x = 2,138,986,096.13 - Step 5: Solve for x
x = 2,138,986,096.13/75,135.49 - Step 6: Final answer
x = 28,468.39
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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.