Finding the Fourth Proportional to 121,843.84, 168,074.40 and 71,533.12
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Solution
The fourth proportional to 121,843.84, 168,074.40 and 71,533.12 is: 98,674.55
Step by Step Solution
- Step 1: Write the proportion equation
121,843.84 : 168,074.40 = 71,533.12 : x - Step 2: Convert to fraction form
121,843.84/168,074.40 = 71,533.12/x - Step 3: Cross multiply
121,843.84x = 168,074.40 × 71,533.12 - Step 4: Simplify right side
121,843.84x = 12,022,886,224.13 - Step 5: Solve for x
x = 12,022,886,224.13/121,843.84 - Step 6: Final answer
x = 98,674.55
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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.