Finding the Fourth Proportional to 66,420,403.20, 99,672,595.20 and 39,126,643.20
Calculator
Solution
The fourth proportional to 66,420,403.20, 99,672,595.20 and 39,126,643.20 is: 58,714,700.32
Step by Step Solution
- Step 1: Write the proportion equation
66,420,403.20 : 99,672,595.20 = 39,126,643.20 : x - Step 2: Convert to fraction form
66,420,403.20/99,672,595.20 = 39,126,643.20/x - Step 3: Cross multiply
66,420,403.20x = 99,672,595.20 × 39,126,643.20 - Step 4: Simplify right side
66,420,403.20x = 3,899,854,069,208,433 - Step 5: Solve for x
x = 3,899,854,069,208,433/66,420,403.20 - Step 6: Final answer
x = 58,714,700.32
Related Problems
Find fourth proportional to 33,210,201.60, 49,836,297.60 and 19,563,321.60
Half scale
Find fourth proportional to 132,840,806.40, 199,345,190.40 and 78,253,286.40
Double scale
Find fourth proportional to 66,420,404.20, 99,672,596.70 and 39,126,644.20
Similar ratio
Find fourth proportional to 99,630,604.80, 149,508,892.80 and 58,689,964.80
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.