Finding the Fourth Proportional to 121,991,649.35, 168,351,401.26 and 66,239,419.61
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Solution
The fourth proportional to 121,991,649.35, 168,351,401.26 and 66,239,419.61 is: 91,411,987.38
Step by Step Solution
- Step 1: Write the proportion equation
121,991,649.35 : 168,351,401.26 = 66,239,419.61 : x - Step 2: Convert to fraction form
121,991,649.35/168,351,401.26 = 66,239,419.61/x - Step 3: Cross multiply
121,991,649.35x = 168,351,401.26 × 66,239,419.61 - Step 4: Simplify right side
121,991,649.35x = 11,151,499,110,496,300 - Step 5: Solve for x
x = 11,151,499,110,496,300/121,991,649.35 - Step 6: Final answer
x = 91,411,987.38
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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.