Finding the Fourth Proportional to 72,489,953.60, 108,734,930.40 and 69,703,035.20
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Solution
The fourth proportional to 72,489,953.60, 108,734,930.40 and 69,703,035.20 is: 104,554,552.80
Step by Step Solution
- Step 1: Write the proportion equation
72,489,953.60 : 108,734,930.40 = 69,703,035.20 : x - Step 2: Convert to fraction form
72,489,953.60/108,734,930.40 = 69,703,035.20/x - Step 3: Cross multiply
72,489,953.60x = 108,734,930.40 × 69,703,035.20 - Step 4: Simplify right side
72,489,953.60x = 7,579,154,681,140,751 - Step 5: Solve for x
x = 7,579,154,681,140,751/72,489,953.60 - Step 6: Final answer
x = 104,554,552.80
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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.