Finding the Fourth Proportional to 145,542,652.80, 218,313,979.20 and 72,770,665.20
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Solution
The fourth proportional to 145,542,652.80, 218,313,979.20 and 72,770,665.20 is: 109,155,997.80
Step by Step Solution
- Step 1: Write the proportion equation
145,542,652.80 : 218,313,979.20 = 72,770,665.20 : x - Step 2: Convert to fraction form
145,542,652.80/218,313,979.20 = 72,770,665.20/x - Step 3: Cross multiply
145,542,652.80x = 218,313,979.20 × 72,770,665.20 - Step 4: Simplify right side
145,542,652.80x = 15,886,853,488,842,964 - Step 5: Solve for x
x = 15,886,853,488,842,964/145,542,652.80 - Step 6: Final answer
x = 109,155,997.80
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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.