Finding the Fourth Proportional to 86,920.80, 130,186.80 and 84,976.80
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Solution
The fourth proportional to 86,920.80, 130,186.80 and 84,976.80 is: 127,275.15
Step by Step Solution
- Step 1: Write the proportion equation
86,920.80 : 130,186.80 = 84,976.80 : x - Step 2: Convert to fraction form
86,920.80/130,186.80 = 84,976.80/x - Step 3: Cross multiply
86,920.80x = 130,186.80 × 84,976.80 - Step 4: Simplify right side
86,920.80x = 11,062,857,666.24 - Step 5: Solve for x
x = 11,062,857,666.24/86,920.80 - Step 6: Final answer
x = 127,275.15
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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.