Finding the Fourth Proportional to 80,919,480.80, 121,379,221.20 and 80,352,610.40
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Solution
The fourth proportional to 80,919,480.80, 121,379,221.20 and 80,352,610.40 is: 120,528,915.60
Step by Step Solution
- Step 1: Write the proportion equation
80,919,480.80 : 121,379,221.20 = 80,352,610.40 : x - Step 2: Convert to fraction form
80,919,480.80/121,379,221.20 = 80,352,610.40/x - Step 3: Cross multiply
80,919,480.80x = 121,379,221.20 × 80,352,610.40 - Step 4: Simplify right side
80,919,480.80x = 9,753,137,271,739,022 - Step 5: Solve for x
x = 9,753,137,271,739,022/80,919,480.80 - Step 6: Final answer
x = 120,528,915.60
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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.