Finding the Fourth Proportional to 128,609,035.20, 193,137,501.60 and 68,142,859.20
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Solution
The fourth proportional to 128,609,035.20, 193,137,501.60 and 68,142,859.20 is: 102,332,946.96
Step by Step Solution
- Step 1: Write the proportion equation
128,609,035.20 : 193,137,501.60 = 68,142,859.20 : x - Step 2: Convert to fraction form
128,609,035.20/193,137,501.60 = 68,142,859.20/x - Step 3: Cross multiply
128,609,035.20x = 193,137,501.60 × 68,142,859.20 - Step 4: Simplify right side
128,609,035.20x = 13,160,941,577,768,574 - Step 5: Solve for x
x = 13,160,941,577,768,574/128,609,035.20 - Step 6: Final answer
x = 102,332,946.96
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.