Finding the Fourth Proportional to 121,920.80, 168,250.94 and 68,206.70
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Solution
The fourth proportional to 121,920.80, 168,250.94 and 68,206.70 is: 94,125.38
Step by Step Solution
- Step 1: Write the proportion equation
121,920.80 : 168,250.94 = 68,206.70 : x - Step 2: Convert to fraction form
121,920.80/168,250.94 = 68,206.70/x - Step 3: Cross multiply
121,920.80x = 168,250.94 × 68,206.70 - Step 4: Simplify right side
121,920.80x = 11,475,841,389.30 - Step 5: Solve for x
x = 11,475,841,389.30/121,920.80 - Step 6: Final answer
x = 94,125.38
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1.5x scale
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.