Finding the Fourth Proportional to 145,979.20, 201,451.35 and 78,911.20
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Solution
The fourth proportional to 145,979.20, 201,451.35 and 78,911.20 is: 108,897.49
Step by Step Solution
- Step 1: Write the proportion equation
145,979.20 : 201,451.35 = 78,911.20 : x - Step 2: Convert to fraction form
145,979.20/201,451.35 = 78,911.20/x - Step 3: Cross multiply
145,979.20x = 201,451.35 × 78,911.20 - Step 4: Simplify right side
145,979.20x = 15,896,767,770.12 - Step 5: Solve for x
x = 15,896,767,770.12/145,979.20 - Step 6: Final answer
x = 108,897.49
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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.