Finding the Fourth Proportional to 145,933.20, 201,387.84 and 78,865.20
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Solution
The fourth proportional to 145,933.20, 201,387.84 and 78,865.20 is: 108,833.99
Step by Step Solution
- Step 1: Write the proportion equation
145,933.20 : 201,387.84 = 78,865.20 : x - Step 2: Convert to fraction form
145,933.20/201,387.84 = 78,865.20/x - Step 3: Cross multiply
145,933.20x = 201,387.84 × 78,865.20 - Step 4: Simplify right side
145,933.20x = 15,882,492,279.17 - Step 5: Solve for x
x = 15,882,492,279.17/145,933.20 - Step 6: Final answer
x = 108,833.99
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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.