Finding the Fourth Proportional to 137,279.97, 189,437.09 and 76,021.76
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Solution
The fourth proportional to 137,279.97, 189,437.09 and 76,021.76 is: 104,904.90
Step by Step Solution
- Step 1: Write the proportion equation
137,279.97 : 189,437.09 = 76,021.76 : x - Step 2: Convert to fraction form
137,279.97/189,437.09 = 76,021.76/x - Step 3: Cross multiply
137,279.97x = 189,437.09 × 76,021.76 - Step 4: Simplify right side
137,279.97x = 14,401,340,991.08 - Step 5: Solve for x
x = 14,401,340,991.08/137,279.97 - Step 6: Final answer
x = 104,904.90
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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.