Finding the Fourth Proportional to 85,455.12, 128,161.62 and 38,698.68
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Solution
The fourth proportional to 85,455.12, 128,161.62 and 38,698.68 is: 58,038.48
Step by Step Solution
- Step 1: Write the proportion equation
85,455.12 : 128,161.62 = 38,698.68 : x - Step 2: Convert to fraction form
85,455.12/128,161.62 = 38,698.68/x - Step 3: Cross multiply
85,455.12x = 128,161.62 × 38,698.68 - Step 4: Simplify right side
85,455.12x = 4,959,685,520.66 - Step 5: Solve for x
x = 4,959,685,520.66/85,455.12 - Step 6: Final answer
x = 58,038.48
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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.