Finding the Fourth Proportional to 172,279.10, 257,908.35 and 128,101.70
Calculator
Solution
The fourth proportional to 172,279.10, 257,908.35 and 128,101.70 is: 191,773.11
Step by Step Solution
- Step 1: Write the proportion equation
172,279.10 : 257,908.35 = 128,101.70 : x - Step 2: Convert to fraction form
172,279.10/257,908.35 = 128,101.70/x - Step 3: Cross multiply
172,279.10x = 257,908.35 × 128,101.70 - Step 4: Simplify right side
172,279.10x = 33,038,498,079.20 - Step 5: Solve for x
x = 33,038,498,079.20/172,279.10 - Step 6: Final answer
x = 191,773.11
Related Problems
Find fourth proportional to 86,139.55, 128,954.18 and 64,050.85
Half scale
Find fourth proportional to 344,558.20, 515,816.70 and 256,203.40
Double scale
Find fourth proportional to 172,280.10, 257,909.85 and 128,102.70
Similar ratio
Find fourth proportional to 258,418.65, 386,862.53 and 192,152.55
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.