Finding the Fourth Proportional to 128,212,578.76, 176,913,788.58 and 72,437,647.96
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Solution
The fourth proportional to 128,212,578.76, 176,913,788.58 and 72,437,647.96 is: 99,952,897.45
Step by Step Solution
- Step 1: Write the proportion equation
128,212,578.76 : 176,913,788.58 = 72,437,647.96 : x - Step 2: Convert to fraction form
128,212,578.76/176,913,788.58 = 72,437,647.96/x - Step 3: Cross multiply
128,212,578.76x = 176,913,788.58 × 72,437,647.96 - Step 4: Simplify right side
128,212,578.76x = 12,815,218,736,427,908 - Step 5: Solve for x
x = 12,815,218,736,427,908/128,212,578.76 - Step 6: Final answer
x = 99,952,897.45
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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.