Finding the Fourth Proportional to 106.31, 146.71 and 62.65
Calculator
Solution
The fourth proportional to 106.31, 146.71 and 62.65 is: 86.45
Step by Step Solution
- Step 1: Write the proportion equation
106.31 : 146.71 = 62.65 : x - Step 2: Convert to fraction form
106.31/146.71 = 62.65/x - Step 3: Cross multiply
106.31x = 146.71 × 62.65 - Step 4: Simplify right side
106.31x = 9,191.23 - Step 5: Solve for x
x = 9,191.23/106.31 - Step 6: Final answer
x = 86.45
Related Problems
Find fourth proportional to 53.16, 73.36 and 31.32
Half scale
Find fourth proportional to 212.63, 293.42 and 125.30
Double scale
Find fourth proportional to 107.31, 148.09 and 63.65
Similar ratio
Find fourth proportional to 159.47, 220.07 and 93.97
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.