Finding the Fourth Proportional to 125,140.80, 172,652.96 and 76,724.80
Calculator
Solution
The fourth proportional to 125,140.80, 172,652.96 and 76,724.80 is: 105,854.88
Step by Step Solution
- Step 1: Write the proportion equation
125,140.80 : 172,652.96 = 76,724.80 : x - Step 2: Convert to fraction form
125,140.80/172,652.96 = 76,724.80/x - Step 3: Cross multiply
125,140.80x = 172,652.96 × 76,724.80 - Step 4: Simplify right side
125,140.80x = 13,246,763,825.41 - Step 5: Solve for x
x = 13,246,763,825.41/125,140.80 - Step 6: Final answer
x = 105,854.88
Related Problems
Find fourth proportional to 62,570.40, 86,326.48 and 38,362.40
Half scale
Find fourth proportional to 250,281.60, 345,305.92 and 153,449.60
Double scale
Find fourth proportional to 125,141.80, 172,654.34 and 76,725.80
Similar ratio
Find fourth proportional to 187,711.20, 258,979.44 and 115,087.20
1.5x scale
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.