Finding the Fourth Proportional to 80,919,139.20, 121,378,708.80 and 48,607,526.40
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Solution
The fourth proportional to 80,919,139.20, 121,378,708.80 and 48,607,526.40 is: 72,911,289.60
Step by Step Solution
- Step 1: Write the proportion equation
80,919,139.20 : 121,378,708.80 = 48,607,526.40 : x - Step 2: Convert to fraction form
80,919,139.20/121,378,708.80 = 48,607,526.40/x - Step 3: Cross multiply
80,919,139.20x = 121,378,708.80 × 48,607,526.40 - Step 4: Simplify right side
80,919,139.20x = 5,899,918,792,393,912 - Step 5: Solve for x
x = 5,899,918,792,393,912/80,919,139.20 - Step 6: Final answer
x = 72,911,289.60
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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.