Finding the Fourth Proportional to 137,178.09, 189,294.98 and 76,743.99
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Solution
The fourth proportional to 137,178.09, 189,294.98 and 76,743.99 is: 105,900.67
Step by Step Solution
- Step 1: Write the proportion equation
137,178.09 : 189,294.98 = 76,743.99 : x - Step 2: Convert to fraction form
137,178.09/189,294.98 = 76,743.99/x - Step 3: Cross multiply
137,178.09x = 189,294.98 × 76,743.99 - Step 4: Simplify right side
137,178.09x = 14,527,251,668.45 - Step 5: Solve for x
x = 14,527,251,668.45/137,178.09 - Step 6: Final answer
x = 105,900.67
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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.