Finding the Fourth Proportional to 81,480,208.20, 122,220,312.30 and 72,410,281.80
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Solution
The fourth proportional to 81,480,208.20, 122,220,312.30 and 72,410,281.80 is: 108,615,422.70
Step by Step Solution
- Step 1: Write the proportion equation
81,480,208.20 : 122,220,312.30 = 72,410,281.80 : x - Step 2: Convert to fraction form
81,480,208.20/122,220,312.30 = 72,410,281.80/x - Step 3: Cross multiply
81,480,208.20x = 122,220,312.30 × 72,410,281.80 - Step 4: Simplify right side
81,480,208.20x = 8,850,007,255,327,006 - Step 5: Solve for x
x = 8,850,007,255,327,006/81,480,208.20 - Step 6: Final answer
x = 108,615,422.70
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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.