Finding the Fourth Proportional to 90,699,478,565.20, 136,049,217,847.80 and 68,659,557,413.20
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Solution
The fourth proportional to 90,699,478,565.20, 136,049,217,847.80 and 68,659,557,413.20 is: 102,989,336,119.80
Step by Step Solution
- Step 1: Write the proportion equation
90,699,478,565.20 : 136,049,217,847.80 = 68,659,557,413.20 : x - Step 2: Convert to fraction form
90,699,478,565.20/136,049,217,847.80 = 68,659,557,413.20/x - Step 3: Cross multiply
90,699,478,565.20x = 136,049,217,847.80 × 68,659,557,413.20 - Step 4: Simplify right side
90,699,478,565.20x = 9,341,079,083,841,977,581,568 - Step 5: Solve for x
x = 9,341,079,083,841,977,581,568/90,699,478,565.20 - Step 6: Final answer
x = 102,989,336,119.80
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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.