Finding the Fourth Proportional to 70,830.84, 106,257.79 and 20,915.99
Calculator
Solution
The fourth proportional to 70,830.84, 106,257.79 and 20,915.99 is: 31,377.38
Step by Step Solution
- Step 1: Write the proportion equation
70,830.84 : 106,257.79 = 20,915.99 : x - Step 2: Convert to fraction form
70,830.84/106,257.79 = 20,915.99/x - Step 3: Cross multiply
70,830.84x = 106,257.79 × 20,915.99 - Step 4: Simplify right side
70,830.84x = 2,222,486,341.77 - Step 5: Solve for x
x = 2,222,486,341.77/70,830.84 - Step 6: Final answer
x = 31,377.38
Related Problems
Find fourth proportional to 35,415.42, 53,128.90 and 10,457.99
Half scale
Find fourth proportional to 141,661.68, 212,515.58 and 41,831.97
Double scale
Find fourth proportional to 70,831.84, 106,259.29 and 20,916.99
Similar ratio
Find fourth proportional to 106,246.26, 159,386.69 and 31,373.98
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.