Finding the Fourth Proportional to 122,777.18, 169,455.75 and 76,858.19
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Solution
The fourth proportional to 122,777.18, 169,455.75 and 76,858.19 is: 106,078.85
Step by Step Solution
- Step 1: Write the proportion equation
122,777.18 : 169,455.75 = 76,858.19 : x - Step 2: Convert to fraction form
122,777.18/169,455.75 = 76,858.19/x - Step 3: Cross multiply
122,777.18x = 169,455.75 × 76,858.19 - Step 4: Simplify right side
122,777.18x = 13,024,062,230.09 - Step 5: Solve for x
x = 13,024,062,230.09/122,777.18 - Step 6: Final answer
x = 106,078.85
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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.