Finding the Fourth Proportional to 121,845.40, 168,145.50 and 68,129.80
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Solution
The fourth proportional to 121,845.40, 168,145.50 and 68,129.80 is: 94,018.48
Step by Step Solution
- Step 1: Write the proportion equation
121,845.40 : 168,145.50 = 68,129.80 : x - Step 2: Convert to fraction form
121,845.40/168,145.50 = 68,129.80/x - Step 3: Cross multiply
121,845.40x = 168,145.50 × 68,129.80 - Step 4: Simplify right side
121,845.40x = 11,455,719,285.90 - Step 5: Solve for x
x = 11,455,719,285.90/121,845.40 - Step 6: Final answer
x = 94,018.48
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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.