Finding the Fourth Proportional to 120,571,272.60, 180,856,908.90 and 115,028,539.80
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Solution
The fourth proportional to 120,571,272.60, 180,856,908.90 and 115,028,539.80 is: 172,542,809.70
Step by Step Solution
- Step 1: Write the proportion equation
120,571,272.60 : 180,856,908.90 = 115,028,539.80 : x - Step 2: Convert to fraction form
120,571,272.60/180,856,908.90 = 115,028,539.80/x - Step 3: Cross multiply
120,571,272.60x = 180,856,908.90 × 115,028,539.80 - Step 4: Simplify right side
120,571,272.60x = 20,803,706,143,508,624 - Step 5: Solve for x
x = 20,803,706,143,508,624/120,571,272.60 - Step 6: Final answer
x = 172,542,809.70
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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.