Finding the Fourth Proportional to 139,869.96, 193,020.60 and 76,207.80
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Solution
The fourth proportional to 139,869.96, 193,020.60 and 76,207.80 is: 105,166.79
Step by Step Solution
- Step 1: Write the proportion equation
139,869.96 : 193,020.60 = 76,207.80 : x - Step 2: Convert to fraction form
139,869.96/193,020.60 = 76,207.80/x - Step 3: Cross multiply
139,869.96x = 193,020.60 × 76,207.80 - Step 4: Simplify right side
139,869.96x = 14,709,675,280.68 - Step 5: Solve for x
x = 14,709,675,280.68/139,869.96 - Step 6: Final answer
x = 105,166.79
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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.