Finding the Fourth Proportional to 139,902.59, 193,059.96 and 76,239.02
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Solution
The fourth proportional to 139,902.59, 193,059.96 and 76,239.02 is: 105,206.79
Step by Step Solution
- Step 1: Write the proportion equation
139,902.59 : 193,059.96 = 76,239.02 : x - Step 2: Convert to fraction form
139,902.59/193,059.96 = 76,239.02/x - Step 3: Cross multiply
139,902.59x = 193,059.96 × 76,239.02 - Step 4: Simplify right side
139,902.59x = 14,718,702,348.39 - Step 5: Solve for x
x = 14,718,702,348.39/139,902.59 - Step 6: Final answer
x = 105,206.79
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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.