Finding the Fourth Proportional to 85,823.70, 128,476.35 and 75,455.70
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Solution
The fourth proportional to 85,823.70, 128,476.35 and 75,455.70 is: 112,955.66
Step by Step Solution
- Step 1: Write the proportion equation
85,823.70 : 128,476.35 = 75,455.70 : x - Step 2: Convert to fraction form
85,823.70/128,476.35 = 75,455.70/x - Step 3: Cross multiply
85,823.70x = 128,476.35 × 75,455.70 - Step 4: Simplify right side
85,823.70x = 9,694,272,922.70 - Step 5: Solve for x
x = 9,694,272,922.70/85,823.70 - Step 6: Final answer
x = 112,955.66
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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.