Finding the Fourth Proportional to 85,779.74, 128,679.12 and 29,613.48
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Solution
The fourth proportional to 85,779.74, 128,679.12 and 29,613.48 is: 44,423.50
Step by Step Solution
- Step 1: Write the proportion equation
85,779.74 : 128,679.12 = 29,613.48 : x - Step 2: Convert to fraction form
85,779.74/128,679.12 = 29,613.48/x - Step 3: Cross multiply
85,779.74x = 128,679.12 × 29,613.48 - Step 4: Simplify right side
85,779.74x = 3,810,636,546.54 - Step 5: Solve for x
x = 3,810,636,546.54/85,779.74 - Step 6: Final answer
x = 44,423.50
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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.