Finding the Fourth Proportional to 139,986.10, 193,125.67 and 86,177.62
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Solution
The fourth proportional to 139,986.10, 193,125.67 and 86,177.62 is: 118,891.17
Step by Step Solution
- Step 1: Write the proportion equation
139,986.10 : 193,125.67 = 86,177.62 : x - Step 2: Convert to fraction form
139,986.10/193,125.67 = 86,177.62/x - Step 3: Cross multiply
139,986.10x = 193,125.67 × 86,177.62 - Step 4: Simplify right side
139,986.10x = 16,643,110,601.51 - Step 5: Solve for x
x = 16,643,110,601.51/139,986.10 - Step 6: Final answer
x = 118,891.17
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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.