Finding the Fourth Proportional to 85,781.74, 128,682.12 and 29,615.48
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Solution
The fourth proportional to 85,781.74, 128,682.12 and 29,615.48 is: 44,426.50
Step by Step Solution
- Step 1: Write the proportion equation
85,781.74 : 128,682.12 = 29,615.48 : x - Step 2: Convert to fraction form
85,781.74/128,682.12 = 29,615.48/x - Step 3: Cross multiply
85,781.74x = 128,682.12 × 29,615.48 - Step 4: Simplify right side
85,781.74x = 3,810,982,751.22 - Step 5: Solve for x
x = 3,810,982,751.22/85,781.74 - Step 6: Final answer
x = 44,426.50
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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.