Finding the Fourth Proportional to 81,920.16, 122,909.40 and 29,334.96
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Solution
The fourth proportional to 81,920.16, 122,909.40 and 29,334.96 is: 44,012.88
Step by Step Solution
- Step 1: Write the proportion equation
81,920.16 : 122,909.40 = 29,334.96 : x - Step 2: Convert to fraction form
81,920.16/122,909.40 = 29,334.96/x - Step 3: Cross multiply
81,920.16x = 122,909.40 × 29,334.96 - Step 4: Simplify right side
81,920.16x = 3,605,542,332.62 - Step 5: Solve for x
x = 3,605,542,332.62/81,920.16 - Step 6: Final answer
x = 44,012.88
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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.