Finding the Fourth Proportional to 98,135.12, 135,421.80 and 55,687.88
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Solution
The fourth proportional to 98,135.12, 135,421.80 and 55,687.88 is: 76,846.63
Step by Step Solution
- Step 1: Write the proportion equation
98,135.12 : 135,421.80 = 55,687.88 : x - Step 2: Convert to fraction form
98,135.12/135,421.80 = 55,687.88/x - Step 3: Cross multiply
98,135.12x = 135,421.80 × 55,687.88 - Step 4: Simplify right side
98,135.12x = 7,541,352,947.78 - Step 5: Solve for x
x = 7,541,352,947.78/98,135.12 - Step 6: Final answer
x = 76,846.63
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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.