Finding the Fourth Proportional to 84,219.40, 126,329.10 and 76,637.80
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Solution
The fourth proportional to 84,219.40, 126,329.10 and 76,637.80 is: 114,956.70
Step by Step Solution
- Step 1: Write the proportion equation
84,219.40 : 126,329.10 = 76,637.80 : x - Step 2: Convert to fraction form
84,219.40/126,329.10 = 76,637.80/x - Step 3: Cross multiply
84,219.40x = 126,329.10 × 76,637.80 - Step 4: Simplify right side
84,219.40x = 9,681,584,299.98 - Step 5: Solve for x
x = 9,681,584,299.98/84,219.40 - Step 6: Final answer
x = 114,956.70
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1.5x scale
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.