Finding the Fourth Proportional to 122,640.13, 169,248.09 and 74,914.93
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Solution
The fourth proportional to 122,640.13, 169,248.09 and 74,914.93 is: 103,385.48
Step by Step Solution
- Step 1: Write the proportion equation
122,640.13 : 169,248.09 = 74,914.93 : x - Step 2: Convert to fraction form
122,640.13/169,248.09 = 74,914.93/x - Step 3: Cross multiply
122,640.13x = 169,248.09 × 74,914.93 - Step 4: Simplify right side
122,640.13x = 12,679,208,814.98 - Step 5: Solve for x
x = 12,679,208,814.98/122,640.13 - Step 6: Final answer
x = 103,385.48
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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.