Finding the Fourth Proportional to 128,783,402.84, 177,704,965.28 and 87,058,253.76
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Solution
The fourth proportional to 128,783,402.84, 177,704,965.28 and 87,058,253.76 is: 120,129,485.79
Step by Step Solution
- Step 1: Write the proportion equation
128,783,402.84 : 177,704,965.28 = 87,058,253.76 : x - Step 2: Convert to fraction form
128,783,402.84/177,704,965.28 = 87,058,253.76/x - Step 3: Cross multiply
128,783,402.84x = 177,704,965.28 × 87,058,253.76 - Step 4: Simplify right side
128,783,402.84x = 15,470,683,961,758,230 - Step 5: Solve for x
x = 15,470,683,961,758,230/128,783,402.84 - Step 6: Final answer
x = 120,129,485.79
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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.