Finding the Fourth Proportional to 156,961.12, 216,615.21 and 85,339.62
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Solution
The fourth proportional to 156,961.12, 216,615.21 and 85,339.62 is: 117,773.50
Step by Step Solution
- Step 1: Write the proportion equation
156,961.12 : 216,615.21 = 85,339.62 : x - Step 2: Convert to fraction form
156,961.12/216,615.21 = 85,339.62/x - Step 3: Cross multiply
156,961.12x = 216,615.21 × 85,339.62 - Step 4: Simplify right side
156,961.12x = 18,485,859,707.62 - Step 5: Solve for x
x = 18,485,859,707.62/156,961.12 - Step 6: Final answer
x = 117,773.50
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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.