Finding the Fourth Proportional to 80,928,713.80, 121,393,070.70 and 72,425,657.80
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Solution
The fourth proportional to 80,928,713.80, 121,393,070.70 and 72,425,657.80 is: 108,638,486.70
Step by Step Solution
- Step 1: Write the proportion equation
80,928,713.80 : 121,393,070.70 = 72,425,657.80 : x - Step 2: Convert to fraction form
80,928,713.80/121,393,070.70 = 72,425,657.80/x - Step 3: Cross multiply
80,928,713.80x = 121,393,070.70 × 72,425,657.80 - Step 4: Simplify right side
80,928,713.80x = 8,791,972,997,809,406 - Step 5: Solve for x
x = 8,791,972,997,809,406/80,928,713.80 - Step 6: Final answer
x = 108,638,486.70
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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.