Finding the Fourth Proportional to 121,378.20, 181,970.10 and 51,199.80
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Solution
The fourth proportional to 121,378.20, 181,970.10 and 51,199.80 is: 76,758.70
Step by Step Solution
- Step 1: Write the proportion equation
121,378.20 : 181,970.10 = 51,199.80 : x - Step 2: Convert to fraction form
121,378.20/181,970.10 = 51,199.80/x - Step 3: Cross multiply
121,378.20x = 181,970.10 × 51,199.80 - Step 4: Simplify right side
121,378.20x = 9,316,832,725.98 - Step 5: Solve for x
x = 9,316,832,725.98/121,378.20 - Step 6: Final answer
x = 76,758.70
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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.