Finding the Fourth Proportional to 85,686.45, 128,306.10 and 68,955.09
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Solution
The fourth proportional to 85,686.45, 128,306.10 and 68,955.09 is: 103,252.72
Step by Step Solution
- Step 1: Write the proportion equation
85,686.45 : 128,306.10 = 68,955.09 : x - Step 2: Convert to fraction form
85,686.45/128,306.10 = 68,955.09/x - Step 3: Cross multiply
85,686.45x = 128,306.10 × 68,955.09 - Step 4: Simplify right side
85,686.45x = 8,847,358,673.05 - Step 5: Solve for x
x = 8,847,358,673.05/85,686.45 - Step 6: Final answer
x = 103,252.72
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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.