Finding the Fourth Proportional to 139,901.45, 193,063.70 and 76,239.09
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Solution
The fourth proportional to 139,901.45, 193,063.70 and 76,239.09 is: 105,209.79
Step by Step Solution
- Step 1: Write the proportion equation
139,901.45 : 193,063.70 = 76,239.09 : x - Step 2: Convert to fraction form
139,901.45/193,063.70 = 76,239.09/x - Step 3: Cross multiply
139,901.45x = 193,063.70 × 76,239.09 - Step 4: Simplify right side
139,901.45x = 14,719,000,990.63 - Step 5: Solve for x
x = 14,719,000,990.63/139,901.45 - Step 6: Final answer
x = 105,209.79
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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.