Finding the Fourth Proportional to 81,193,215.60, 121,789,823.40 and 40,236,829.20
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Solution
The fourth proportional to 81,193,215.60, 121,789,823.40 and 40,236,829.20 is: 60,355,243.80
Step by Step Solution
- Step 1: Write the proportion equation
81,193,215.60 : 121,789,823.40 = 40,236,829.20 : x - Step 2: Convert to fraction form
81,193,215.60/121,789,823.40 = 40,236,829.20/x - Step 3: Cross multiply
81,193,215.60x = 121,789,823.40 × 40,236,829.20 - Step 4: Simplify right side
81,193,215.60x = 4,900,436,322,443,964 - Step 5: Solve for x
x = 4,900,436,322,443,964/81,193,215.60 - Step 6: Final answer
x = 60,355,243.80
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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.