Finding the Fourth Proportional to 122,961.18, 169,329.11 and 106,821.12
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Solution
The fourth proportional to 122,961.18, 169,329.11 and 106,821.12 is: 147,102.72
Step by Step Solution
- Step 1: Write the proportion equation
122,961.18 : 169,329.11 = 106,821.12 : x - Step 2: Convert to fraction form
122,961.18/169,329.11 = 106,821.12/x - Step 3: Cross multiply
122,961.18x = 169,329.11 × 106,821.12 - Step 4: Simplify right side
122,961.18x = 18,087,924,644.70 - Step 5: Solve for x
x = 18,087,924,644.70/122,961.18 - Step 6: Final answer
x = 147,102.72
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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.