Finding the Fourth Proportional to 121,746,717.81, 168,005,969.42 and 65,990,941.09
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Solution
The fourth proportional to 121,746,717.81, 168,005,969.42 and 65,990,941.09 is: 91,065,058.92
Step by Step Solution
- Step 1: Write the proportion equation
121,746,717.81 : 168,005,969.42 = 65,990,941.09 : x - Step 2: Convert to fraction form
121,746,717.81/168,005,969.42 = 65,990,941.09/x - Step 3: Cross multiply
121,746,717.81x = 168,005,969.42 × 65,990,941.09 - Step 4: Simplify right side
121,746,717.81x = 11,086,872,030,677,932 - Step 5: Solve for x
x = 11,086,872,030,677,932/121,746,717.81 - Step 6: Final answer
x = 91,065,058.92
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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.