Finding the Fourth Proportional to 143,623.80, 215,435.70 and 81,415.80
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Solution
The fourth proportional to 143,623.80, 215,435.70 and 81,415.80 is: 122,123.70
Step by Step Solution
- Step 1: Write the proportion equation
143,623.80 : 215,435.70 = 81,415.80 : x - Step 2: Convert to fraction form
143,623.80/215,435.70 = 81,415.80/x - Step 3: Cross multiply
143,623.80x = 215,435.70 × 81,415.80 - Step 4: Simplify right side
143,623.80x = 17,539,869,864.06 - Step 5: Solve for x
x = 17,539,869,864.06/143,623.80 - Step 6: Final answer
x = 122,123.70
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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.