Finding the Fourth Proportional to 81,933.79, 122,901.08 and 28,625.54
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Solution
The fourth proportional to 81,933.79, 122,901.08 and 28,625.54 is: 42,938.45
Step by Step Solution
- Step 1: Write the proportion equation
81,933.79 : 122,901.08 = 28,625.54 : x - Step 2: Convert to fraction form
81,933.79/122,901.08 = 28,625.54/x - Step 3: Cross multiply
81,933.79x = 122,901.08 × 28,625.54 - Step 4: Simplify right side
81,933.79x = 3,518,109,781.58 - Step 5: Solve for x
x = 3,518,109,781.58/81,933.79 - Step 6: Final answer
x = 42,938.45
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1.5x scale
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.