Finding the Fourth Proportional to 83,659,518.30, 125,489,277.45 and 77,990,814.30
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Solution
The fourth proportional to 83,659,518.30, 125,489,277.45 and 77,990,814.30 is: 116,986,221.45
Step by Step Solution
- Step 1: Write the proportion equation
83,659,518.30 : 125,489,277.45 = 77,990,814.30 : x - Step 2: Convert to fraction form
83,659,518.30/125,489,277.45 = 77,990,814.30/x - Step 3: Cross multiply
83,659,518.30x = 125,489,277.45 × 77,990,814.30 - Step 4: Simplify right side
83,659,518.30x = 9,787,010,934,244,128 - Step 5: Solve for x
x = 9,787,010,934,244,128/83,659,518.30 - Step 6: Final answer
x = 116,986,221.45
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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.