Finding the Fourth Proportional to 138,215.95, 190,735.89 and 76,961.72
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Solution
The fourth proportional to 138,215.95, 190,735.89 and 76,961.72 is: 106,205.99
Step by Step Solution
- Step 1: Write the proportion equation
138,215.95 : 190,735.89 = 76,961.72 : x - Step 2: Convert to fraction form
138,215.95/190,735.89 = 76,961.72/x - Step 3: Cross multiply
138,215.95x = 190,735.89 × 76,961.72 - Step 4: Simplify right side
138,215.95x = 14,679,362,160.13 - Step 5: Solve for x
x = 14,679,362,160.13/138,215.95 - Step 6: Final answer
x = 106,205.99
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1.5x scale
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.