Finding the Fourth Proportional to 83,974,639.42, 115,830,904.93 and 55,716,400.78
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Solution
The fourth proportional to 83,974,639.42, 115,830,904.93 and 55,716,400.78 is: 76,852,739.90
Step by Step Solution
- Step 1: Write the proportion equation
83,974,639.42 : 115,830,904.93 = 55,716,400.78 : x - Step 2: Convert to fraction form
83,974,639.42/115,830,904.93 = 55,716,400.78/x - Step 3: Cross multiply
83,974,639.42x = 115,830,904.93 × 55,716,400.78 - Step 4: Simplify right side
83,974,639.42x = 6,453,681,121,789,958 - Step 5: Solve for x
x = 6,453,681,121,789,958/83,974,639.42 - Step 6: Final answer
x = 76,852,739.90
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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.