Finding the Fourth Proportional to 86,070.10, 128,865.70 and 43,859.18
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Solution
The fourth proportional to 86,070.10, 128,865.70 and 43,859.18 is: 65,666.75
Step by Step Solution
- Step 1: Write the proportion equation
86,070.10 : 128,865.70 = 43,859.18 : x - Step 2: Convert to fraction form
86,070.10/128,865.70 = 43,859.18/x - Step 3: Cross multiply
86,070.10x = 128,865.70 × 43,859.18 - Step 4: Simplify right side
86,070.10x = 5,651,943,932.13 - Step 5: Solve for x
x = 5,651,943,932.13/86,070.10 - Step 6: Final answer
x = 65,666.75
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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.