Finding the Fourth Proportional to 112,769,998.80, 169,154,998.20 and 76,938,190.80
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Solution
The fourth proportional to 112,769,998.80, 169,154,998.20 and 76,938,190.80 is: 115,407,286.20
Step by Step Solution
- Step 1: Write the proportion equation
112,769,998.80 : 169,154,998.20 = 76,938,190.80 : x - Step 2: Convert to fraction form
112,769,998.80/169,154,998.20 = 76,938,190.80/x - Step 3: Cross multiply
112,769,998.80x = 169,154,998.20 × 76,938,190.80 - Step 4: Simplify right side
112,769,998.80x = 13,014,479,526,285,256 - Step 5: Solve for x
x = 13,014,479,526,285,256/112,769,998.80 - Step 6: Final answer
x = 115,407,286.20
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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.