Finding the Fourth Proportional to 93.74, 129.36 and 87.21
Calculator
Solution
The fourth proportional to 93.74, 129.36 and 87.21 is: 120.35
Step by Step Solution
- Step 1: Write the proportion equation
93.74 : 129.36 = 87.21 : x - Step 2: Convert to fraction form
93.74/129.36 = 87.21/x - Step 3: Cross multiply
93.74x = 129.36 × 87.21 - Step 4: Simplify right side
93.74x = 11,281.99 - Step 5: Solve for x
x = 11,281.99/93.74 - Step 6: Final answer
x = 120.35
Related Problems
Find fourth proportional to 46.87, 64.68 and 43.61
Half scale
Find fourth proportional to 187.49, 258.72 and 174.43
Double scale
Find fourth proportional to 94.74, 130.74 and 88.21
Similar ratio
Find fourth proportional to 140.62, 194.04 and 130.82
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.