Finding the Fourth Proportional to 138,589.99, 191,261.66 and 81,230.45
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Solution
The fourth proportional to 138,589.99, 191,261.66 and 81,230.45 is: 112,102.39
Step by Step Solution
- Step 1: Write the proportion equation
138,589.99 : 191,261.66 = 81,230.45 : x - Step 2: Convert to fraction form
138,589.99/191,261.66 = 81,230.45/x - Step 3: Cross multiply
138,589.99x = 191,261.66 × 81,230.45 - Step 4: Simplify right side
138,589.99x = 15,536,269,347.09 - Step 5: Solve for x
x = 15,536,269,347.09/138,589.99 - Step 6: Final answer
x = 112,102.39
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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.