Finding the Fourth Proportional to 78,178,739.36, 107,841,836.76 and 48,758,995.76
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Solution
The fourth proportional to 78,178,739.36, 107,841,836.76 and 48,758,995.76 is: 67,259,458.32
Step by Step Solution
- Step 1: Write the proportion equation
78,178,739.36 : 107,841,836.76 = 48,758,995.76 : x - Step 2: Convert to fraction form
78,178,739.36/107,841,836.76 = 48,758,995.76/x - Step 3: Cross multiply
78,178,739.36x = 107,841,836.76 × 48,758,995.76 - Step 4: Simplify right side
78,178,739.36x = 5,258,259,661,331,452 - Step 5: Solve for x
x = 5,258,259,661,331,452/78,178,739.36 - Step 6: Final answer
x = 67,259,458.32
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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.