Finding the Fourth Proportional to 138,197.25, 190,712.97 and 77,768.91
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Solution
The fourth proportional to 138,197.25, 190,712.97 and 77,768.91 is: 107,321.53
Step by Step Solution
- Step 1: Write the proportion equation
138,197.25 : 190,712.97 = 77,768.91 : x - Step 2: Convert to fraction form
138,197.25/190,712.97 = 77,768.91/x - Step 3: Cross multiply
138,197.25x = 190,712.97 × 77,768.91 - Step 4: Simplify right side
138,197.25x = 14,831,539,799.76 - Step 5: Solve for x
x = 14,831,539,799.76/138,197.25 - Step 6: Final answer
x = 107,321.53
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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.