Finding the Fourth Proportional to 81,267.24, 121,906.33 and 31,347.75
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Solution
The fourth proportional to 81,267.24, 121,906.33 and 31,347.75 is: 47,023.73
Step by Step Solution
- Step 1: Write the proportion equation
81,267.24 : 121,906.33 = 31,347.75 : x - Step 2: Convert to fraction form
81,267.24/121,906.33 = 31,347.75/x - Step 3: Cross multiply
81,267.24x = 121,906.33 × 31,347.75 - Step 4: Simplify right side
81,267.24x = 3,821,489,077.89 - Step 5: Solve for x
x = 3,821,489,077.89/81,267.24 - Step 6: Final answer
x = 47,023.73
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.