Finding the Fourth Proportional to 85,865.24, 128,631.08 and 48,310.80
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Solution
The fourth proportional to 85,865.24, 128,631.08 and 48,310.80 is: 72,372.37
Step by Step Solution
- Step 1: Write the proportion equation
85,865.24 : 128,631.08 = 48,310.80 : x - Step 2: Convert to fraction form
85,865.24/128,631.08 = 48,310.80/x - Step 3: Cross multiply
85,865.24x = 128,631.08 × 48,310.80 - Step 4: Simplify right side
85,865.24x = 6,214,270,138.11 - Step 5: Solve for x
x = 6,214,270,138.11/85,865.24 - Step 6: Final answer
x = 72,372.37
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.