Finding the Fourth Proportional to 139,708.40, 192,310.62 and 121,772.12
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Solution
The fourth proportional to 139,708.40, 192,310.62 and 121,772.12 is: 167,621.07
Step by Step Solution
- Step 1: Write the proportion equation
139,708.40 : 192,310.62 = 121,772.12 : x - Step 2: Convert to fraction form
139,708.40/192,310.62 = 121,772.12/x - Step 3: Cross multiply
139,708.40x = 192,310.62 × 121,772.12 - Step 4: Simplify right side
139,708.40x = 23,418,071,895.91 - Step 5: Solve for x
x = 23,418,071,895.91/139,708.40 - Step 6: Final answer
x = 167,621.07
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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.