Finding the Fourth Proportional to 78,801,830.20, 118,202,745.30 and 74,337,725.80
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Solution
The fourth proportional to 78,801,830.20, 118,202,745.30 and 74,337,725.80 is: 111,506,588.70
Step by Step Solution
- Step 1: Write the proportion equation
78,801,830.20 : 118,202,745.30 = 74,337,725.80 : x - Step 2: Convert to fraction form
78,801,830.20/118,202,745.30 = 74,337,725.80/x - Step 3: Cross multiply
78,801,830.20x = 118,202,745.30 × 74,337,725.80 - Step 4: Simplify right side
78,801,830.20x = 8,786,923,268,918,638 - Step 5: Solve for x
x = 8,786,923,268,918,638/78,801,830.20 - Step 6: Final answer
x = 111,506,588.70
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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.