Finding the Fourth Proportional to 153,781.08, 212,219.64 and 86,713.08
Calculator
Solution
The fourth proportional to 153,781.08, 212,219.64 and 86,713.08 is: 119,665.04
Step by Step Solution
- Step 1: Write the proportion equation
153,781.08 : 212,219.64 = 86,713.08 : x - Step 2: Convert to fraction form
153,781.08/212,219.64 = 86,713.08/x - Step 3: Cross multiply
153,781.08x = 212,219.64 × 86,713.08 - Step 4: Simplify right side
153,781.08x = 18,402,218,620.89 - Step 5: Solve for x
x = 18,402,218,620.89/153,781.08 - Step 6: Final answer
x = 119,665.04
Related Problems
Find fourth proportional to 76,890.54, 106,109.82 and 43,356.54
Half scale
Find fourth proportional to 307,562.16, 424,439.28 and 173,426.16
Double scale
Find fourth proportional to 153,782.08, 212,221.02 and 86,714.08
Similar ratio
Find fourth proportional to 230,671.62, 318,329.46 and 130,069.62
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.