Finding the Fourth Proportional to 221,378,875.20, 305,531,028 and 128,540,900.16
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Solution
The fourth proportional to 221,378,875.20, 305,531,028 and 128,540,900.16 is: 177,402,804.72
Step by Step Solution
- Step 1: Write the proportion equation
221,378,875.20 : 305,531,028 = 128,540,900.16 : x - Step 2: Convert to fraction form
221,378,875.20/305,531,028 = 128,540,900.16/x - Step 3: Cross multiply
221,378,875.20x = 305,531,028 × 128,540,900.16 - Step 4: Simplify right side
221,378,875.20x = 39,273,233,365,930,160 - Step 5: Solve for x
x = 39,273,233,365,930,160/221,378,875.20 - Step 6: Final answer
x = 177,402,804.72
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.