Finding the Fourth Proportional to 81,357.75, 122,038.79 and 25,953.75
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Solution
The fourth proportional to 81,357.75, 122,038.79 and 25,953.75 is: 38,931.31
Step by Step Solution
- Step 1: Write the proportion equation
81,357.75 : 122,038.79 = 25,953.75 : x - Step 2: Convert to fraction form
81,357.75/122,038.79 = 25,953.75/x - Step 3: Cross multiply
81,357.75x = 122,038.79 × 25,953.75 - Step 4: Simplify right side
81,357.75x = 3,167,364,116.19 - Step 5: Solve for x
x = 3,167,364,116.19/81,357.75 - Step 6: Final answer
x = 38,931.31
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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.