Finding the Fourth Proportional to 128,461,765.48, 177,276,789.26 and 69,724,430.42
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Solution
The fourth proportional to 128,461,765.48, 177,276,789.26 and 69,724,430.42 is: 96,219,471.31
Step by Step Solution
- Step 1: Write the proportion equation
128,461,765.48 : 177,276,789.26 = 69,724,430.42 : x - Step 2: Convert to fraction form
128,461,765.48/177,276,789.26 = 69,724,430.42/x - Step 3: Cross multiply
128,461,765.48x = 177,276,789.26 × 69,724,430.42 - Step 4: Simplify right side
128,461,765.48x = 12,360,523,157,839,872 - Step 5: Solve for x
x = 12,360,523,157,839,872/128,461,765.48 - Step 6: Final answer
x = 96,219,471.31
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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.