Finding the Fourth Proportional to 122,721.08, 169,352.17 and 80,278.70
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Solution
The fourth proportional to 122,721.08, 169,352.17 and 80,278.70 is: 110,782.69
Step by Step Solution
- Step 1: Write the proportion equation
122,721.08 : 169,352.17 = 80,278.70 : x - Step 2: Convert to fraction form
122,721.08/169,352.17 = 80,278.70/x - Step 3: Cross multiply
122,721.08x = 169,352.17 × 80,278.70 - Step 4: Simplify right side
122,721.08x = 13,595,371,002.32 - Step 5: Solve for x
x = 13,595,371,002.32/122,721.08 - Step 6: Final answer
x = 110,782.69
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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.