Finding the Fourth Proportional to 138,716.24, 207,986.88 and 76,430.48
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Solution
The fourth proportional to 138,716.24, 207,986.88 and 76,430.48 is: 114,597.52
Step by Step Solution
- Step 1: Write the proportion equation
138,716.24 : 207,986.88 = 76,430.48 : x - Step 2: Convert to fraction form
138,716.24/207,986.88 = 76,430.48/x - Step 3: Cross multiply
138,716.24x = 207,986.88 × 76,430.48 - Step 4: Simplify right side
138,716.24x = 15,896,537,072.10 - Step 5: Solve for x
x = 15,896,537,072.10/138,716.24 - Step 6: Final answer
x = 114,597.52
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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.