Finding the Fourth Proportional to 121,856.40, 168,160.68 and 68,140.80
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Solution
The fourth proportional to 121,856.40, 168,160.68 and 68,140.80 is: 94,033.66
Step by Step Solution
- Step 1: Write the proportion equation
121,856.40 : 168,160.68 = 68,140.80 : x - Step 2: Convert to fraction form
121,856.40/168,160.68 = 68,140.80/x - Step 3: Cross multiply
121,856.40x = 168,160.68 × 68,140.80 - Step 4: Simplify right side
121,856.40x = 11,458,603,263.74 - Step 5: Solve for x
x = 11,458,603,263.74/121,856.40 - Step 6: Final answer
x = 94,033.66
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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.