Finding the Fourth Proportional to 216,855.96, 299,261.48 and 121,385.40
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Solution
The fourth proportional to 216,855.96, 299,261.48 and 121,385.40 is: 167,511.99
Step by Step Solution
- Step 1: Write the proportion equation
216,855.96 : 299,261.48 = 121,385.40 : x - Step 2: Convert to fraction form
216,855.96/299,261.48 = 121,385.40/x - Step 3: Cross multiply
216,855.96x = 299,261.48 × 121,385.40 - Step 4: Simplify right side
216,855.96x = 36,325,974,454.39 - Step 5: Solve for x
x = 36,325,974,454.39/216,855.96 - Step 6: Final answer
x = 167,511.99
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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.