Finding the Fourth Proportional to 85,637.84, 128,469.08 and 26,478.12
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Solution
The fourth proportional to 85,637.84, 128,469.08 and 26,478.12 is: 39,720.99
Step by Step Solution
- Step 1: Write the proportion equation
85,637.84 : 128,469.08 = 26,478.12 : x - Step 2: Convert to fraction form
85,637.84/128,469.08 = 26,478.12/x - Step 3: Cross multiply
85,637.84x = 128,469.08 × 26,478.12 - Step 4: Simplify right side
85,637.84x = 3,401,619,716.53 - Step 5: Solve for x
x = 3,401,619,716.53/85,637.84 - Step 6: Final answer
x = 39,720.99
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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.