Finding the Fourth Proportional to 81,203.40, 121,805.10 and 53,209.80
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Solution
The fourth proportional to 81,203.40, 121,805.10 and 53,209.80 is: 79,814.70
Step by Step Solution
- Step 1: Write the proportion equation
81,203.40 : 121,805.10 = 53,209.80 : x - Step 2: Convert to fraction form
81,203.40/121,805.10 = 53,209.80/x - Step 3: Cross multiply
81,203.40x = 121,805.10 × 53,209.80 - Step 4: Simplify right side
81,203.40x = 6,481,225,009.98 - Step 5: Solve for x
x = 6,481,225,009.98/81,203.40 - Step 6: Final answer
x = 79,814.70
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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.