Finding the Fourth Proportional to 122,644.48, 169,249.12 and 68,931.68
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Solution
The fourth proportional to 122,644.48, 169,249.12 and 68,931.68 is: 95,125.57
Step by Step Solution
- Step 1: Write the proportion equation
122,644.48 : 169,249.12 = 68,931.68 : x - Step 2: Convert to fraction form
122,644.48/169,249.12 = 68,931.68/x - Step 3: Cross multiply
122,644.48x = 169,249.12 × 68,931.68 - Step 4: Simplify right side
122,644.48x = 11,666,626,180.12 - Step 5: Solve for x
x = 11,666,626,180.12/122,644.48 - Step 6: Final answer
x = 95,125.57
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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.