Finding the Fourth Proportional to 72,920.75, 100,630.70 and 39,386.75
Calculator
Solution
The fourth proportional to 72,920.75, 100,630.70 and 39,386.75 is: 54,353.75
Step by Step Solution
- Step 1: Write the proportion equation
72,920.75 : 100,630.70 = 39,386.75 : x - Step 2: Convert to fraction form
72,920.75/100,630.70 = 39,386.75/x - Step 3: Cross multiply
72,920.75x = 100,630.70 × 39,386.75 - Step 4: Simplify right side
72,920.75x = 3,963,516,223.23 - Step 5: Solve for x
x = 3,963,516,223.23/72,920.75 - Step 6: Final answer
x = 54,353.75
Related Problems
Find fourth proportional to 36,460.38, 50,315.35 and 19,693.38
Half scale
Find fourth proportional to 145,841.50, 201,261.40 and 78,773.50
Double scale
Find fourth proportional to 72,921.75, 100,632.08 and 39,387.75
Similar ratio
Find fourth proportional to 109,381.13, 150,946.05 and 59,080.13
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.