Finding the Fourth Proportional to 128,783,400.84, 177,704,962.52 and 87,058,251.77
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Solution
The fourth proportional to 128,783,400.84, 177,704,962.52 and 87,058,251.77 is: 120,129,483.04
Step by Step Solution
- Step 1: Write the proportion equation
128,783,400.84 : 177,704,962.52 = 87,058,251.77 : x - Step 2: Convert to fraction form
128,783,400.84/177,704,962.52 = 87,058,251.77/x - Step 3: Cross multiply
128,783,400.84x = 177,704,962.52 × 87,058,251.77 - Step 4: Simplify right side
128,783,400.84x = 15,470,683,366,520,756 - Step 5: Solve for x
x = 15,470,683,366,520,756/128,783,400.84 - Step 6: Final answer
x = 120,129,483.04
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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.