Finding the Fourth Proportional to 77,128,464.80, 115,692,697.20 and 77,128,464.80
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Solution
The fourth proportional to 77,128,464.80, 115,692,697.20 and 77,128,464.80 is: 115,692,697.20
Step by Step Solution
- Step 1: Write the proportion equation
77,128,464.80 : 115,692,697.20 = 77,128,464.80 : x - Step 2: Convert to fraction form
77,128,464.80/115,692,697.20 = 77,128,464.80/x - Step 3: Cross multiply
77,128,464.80x = 115,692,697.20 × 77,128,464.80 - Step 4: Simplify right side
77,128,464.80x = 8,923,200,123,607,258 - Step 5: Solve for x
x = 8,923,200,123,607,258/77,128,464.80 - Step 6: Final answer
x = 115,692,697.20
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.