Finding the Fourth Proportional to 139,859.99, 193,006.80 and 76,197.78
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Solution
The fourth proportional to 139,859.99, 193,006.80 and 76,197.78 is: 105,152.95
Step by Step Solution
- Step 1: Write the proportion equation
139,859.99 : 193,006.80 = 76,197.78 : x - Step 2: Convert to fraction form
139,859.99/193,006.80 = 76,197.78/x - Step 3: Cross multiply
139,859.99x = 193,006.80 × 76,197.78 - Step 4: Simplify right side
139,859.99x = 14,706,689,684.90 - Step 5: Solve for x
x = 14,706,689,684.90/139,859.99 - Step 6: Final answer
x = 105,152.95
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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.