Finding the Fourth Proportional to 122,840.15, 169,503.89 and 71,842.80
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Solution
The fourth proportional to 122,840.15, 169,503.89 and 71,842.80 is: 99,133.99
Step by Step Solution
- Step 1: Write the proportion equation
122,840.15 : 169,503.89 = 71,842.80 : x - Step 2: Convert to fraction form
122,840.15/169,503.89 = 71,842.80/x - Step 3: Cross multiply
122,840.15x = 169,503.89 × 71,842.80 - Step 4: Simplify right side
122,840.15x = 12,177,633,795.57 - Step 5: Solve for x
x = 12,177,633,795.57/122,840.15 - Step 6: Final answer
x = 99,133.99
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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.