Finding the Fourth Proportional to 139,986.57, 209,652.88 and 128,683.07
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Solution
The fourth proportional to 139,986.57, 209,652.88 and 128,683.07 is: 192,724.02
Step by Step Solution
- Step 1: Write the proportion equation
139,986.57 : 209,652.88 = 128,683.07 : x - Step 2: Convert to fraction form
139,986.57/209,652.88 = 128,683.07/x - Step 3: Cross multiply
139,986.57x = 209,652.88 × 128,683.07 - Step 4: Simplify right side
139,986.57x = 26,978,775,589.33 - Step 5: Solve for x
x = 26,978,775,589.33/139,986.57 - Step 6: Final answer
x = 192,724.02
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.