Finding the Fourth Proportional to 139,869.20, 193,021.71 and 76,206.98
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Solution
The fourth proportional to 139,869.20, 193,021.71 and 76,206.98 is: 105,166.84
Step by Step Solution
- Step 1: Write the proportion equation
139,869.20 : 193,021.71 = 76,206.98 : x - Step 2: Convert to fraction form
139,869.20/193,021.71 = 76,206.98/x - Step 3: Cross multiply
139,869.20x = 193,021.71 × 76,206.98 - Step 4: Simplify right side
139,869.20x = 14,709,601,593.54 - Step 5: Solve for x
x = 14,709,601,593.54/139,869.20 - Step 6: Final answer
x = 105,166.84
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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.