Finding the Fourth Proportional to 140,303.21, 193,611.20 and 76,628.70
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Solution
The fourth proportional to 140,303.21, 193,611.20 and 76,628.70 is: 105,743.66
Step by Step Solution
- Step 1: Write the proportion equation
140,303.21 : 193,611.20 = 76,628.70 : x - Step 2: Convert to fraction form
140,303.21/193,611.20 = 76,628.70/x - Step 3: Cross multiply
140,303.21x = 193,611.20 × 76,628.70 - Step 4: Simplify right side
140,303.21x = 14,836,174,178.30 - Step 5: Solve for x
x = 14,836,174,178.30/140,303.21 - Step 6: Final answer
x = 105,743.66
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.