Finding the Fourth Proportional to 72,409,871.84, 108,612,402.05 and 31,469,352.12
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Solution
The fourth proportional to 72,409,871.84, 108,612,402.05 and 31,469,352.12 is: 47,202,982.66
Step by Step Solution
- Step 1: Write the proportion equation
72,409,871.84 : 108,612,402.05 = 31,469,352.12 : x - Step 2: Convert to fraction form
72,409,871.84/108,612,402.05 = 31,469,352.12/x - Step 3: Cross multiply
72,409,871.84x = 108,612,402.05 × 31,469,352.12 - Step 4: Simplify right side
72,409,871.84x = 3,417,961,924,789,133 - Step 5: Solve for x
x = 3,417,961,924,789,133/72,409,871.84 - Step 6: Final answer
x = 47,202,982.66
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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.