Finding the Fourth Proportional to 139,860.99, 193,008.18 and 76,198.79
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Solution
The fourth proportional to 139,860.99, 193,008.18 and 76,198.79 is: 105,154.33
Step by Step Solution
- Step 1: Write the proportion equation
139,860.99 : 193,008.18 = 76,198.79 : x - Step 2: Convert to fraction form
139,860.99/193,008.18 = 76,198.79/x - Step 3: Cross multiply
139,860.99x = 193,008.18 × 76,198.79 - Step 4: Simplify right side
139,860.99x = 14,706,988,811.06 - Step 5: Solve for x
x = 14,706,988,811.06/139,860.99 - Step 6: Final answer
x = 105,154.33
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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.