Finding the Fourth Proportional to 155,511.20, 214,575.36 and 87,519.12
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Solution
The fourth proportional to 155,511.20, 214,575.36 and 87,519.12 is: 120,759.45
Step by Step Solution
- Step 1: Write the proportion equation
155,511.20 : 214,575.36 = 87,519.12 : x - Step 2: Convert to fraction form
155,511.20/214,575.36 = 87,519.12/x - Step 3: Cross multiply
155,511.20x = 214,575.36 × 87,519.12 - Step 4: Simplify right side
155,511.20x = 18,779,446,680.88 - Step 5: Solve for x
x = 18,779,446,680.88/155,511.20 - Step 6: Final answer
x = 120,759.45
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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.