Finding the Fourth Proportional to 85,769.22, 128,585.10 and 40,767.99
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Solution
The fourth proportional to 85,769.22, 128,585.10 and 40,767.99 is: 61,119.32
Step by Step Solution
- Step 1: Write the proportion equation
85,769.22 : 128,585.10 = 40,767.99 : x - Step 2: Convert to fraction form
85,769.22/128,585.10 = 40,767.99/x - Step 3: Cross multiply
85,769.22x = 128,585.10 × 40,767.99 - Step 4: Simplify right side
85,769.22x = 5,242,156,070.95 - Step 5: Solve for x
x = 5,242,156,070.95/85,769.22 - Step 6: Final answer
x = 61,119.32
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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.