Finding the Fourth Proportional to 99,432.13, 137,216.37 and 54,720.13
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Solution
The fourth proportional to 99,432.13, 137,216.37 and 54,720.13 is: 75,513.80
Step by Step Solution
- Step 1: Write the proportion equation
99,432.13 : 137,216.37 = 54,720.13 : x - Step 2: Convert to fraction form
99,432.13/137,216.37 = 54,720.13/x - Step 3: Cross multiply
99,432.13x = 137,216.37 × 54,720.13 - Step 4: Simplify right side
99,432.13x = 7,508,497,604.53 - Step 5: Solve for x
x = 7,508,497,604.53/99,432.13 - Step 6: Final answer
x = 75,513.80
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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.