Finding the Fourth Proportional to 72,245,155.35, 99,698,378.68 and 39,205,404.57
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Solution
The fourth proportional to 72,245,155.35, 99,698,378.68 and 39,205,404.57 is: 54,103,493.20
Step by Step Solution
- Step 1: Write the proportion equation
72,245,155.35 : 99,698,378.68 = 39,205,404.57 : x - Step 2: Convert to fraction form
72,245,155.35/99,698,378.68 = 39,205,404.57/x - Step 3: Cross multiply
72,245,155.35x = 99,698,378.68 × 39,205,404.57 - Step 4: Simplify right side
72,245,155.35x = 3,908,715,270,775,203 - Step 5: Solve for x
x = 3,908,715,270,775,203/72,245,155.35 - Step 6: Final answer
x = 54,103,493.20
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.