Finding the Fourth Proportional to 139,612.94, 207,840.36 and 138,782.57
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Solution
The fourth proportional to 139,612.94, 207,840.36 and 138,782.57 is: 206,604.20
Step by Step Solution
- Step 1: Write the proportion equation
139,612.94 : 207,840.36 = 138,782.57 : x - Step 2: Convert to fraction form
139,612.94/207,840.36 = 138,782.57/x - Step 3: Cross multiply
139,612.94x = 207,840.36 × 138,782.57 - Step 4: Simplify right side
139,612.94x = 28,844,619,830.13 - Step 5: Solve for x
x = 28,844,619,830.13/139,612.94 - Step 6: Final answer
x = 206,604.20
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.