Finding the Fourth Proportional to 187,129.53, 258,353.16 and 121,780.62
Calculator
Solution
The fourth proportional to 187,129.53, 258,353.16 and 121,780.62 is: 168,131.71
Step by Step Solution
- Step 1: Write the proportion equation
187,129.53 : 258,353.16 = 121,780.62 : x - Step 2: Convert to fraction form
187,129.53/258,353.16 = 121,780.62/x - Step 3: Cross multiply
187,129.53x = 258,353.16 × 121,780.62 - Step 4: Simplify right side
187,129.53x = 31,462,408,003.76 - Step 5: Solve for x
x = 31,462,408,003.76/187,129.53 - Step 6: Final answer
x = 168,131.71
Related Problems
Find fourth proportional to 93,564.77, 129,176.58 and 60,890.31
Half scale
Find fourth proportional to 374,259.06, 516,706.32 and 243,561.24
Double scale
Find fourth proportional to 187,130.53, 258,354.54 and 121,781.62
Similar ratio
Find fourth proportional to 280,694.30, 387,529.74 and 182,670.93
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.