Finding the Fourth Proportional to 128,427,120.90, 177,228,527.94 and 69,688,292.22
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Solution
The fourth proportional to 128,427,120.90, 177,228,527.94 and 69,688,292.22 is: 96,169,355.49
Step by Step Solution
- Step 1: Write the proportion equation
128,427,120.90 : 177,228,527.94 = 69,688,292.22 : x - Step 2: Convert to fraction form
128,427,120.90/177,228,527.94 = 69,688,292.22/x - Step 3: Cross multiply
128,427,120.90x = 177,228,527.94 × 69,688,292.22 - Step 4: Simplify right side
128,427,120.90x = 12,350,753,444,803,154 - Step 5: Solve for x
x = 12,350,753,444,803,154/128,427,120.90 - Step 6: Final answer
x = 96,169,355.49
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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.