Finding the Fourth Proportional to 128,735,557.20, 177,653,835.36 and 69,998,243.85
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Solution
The fourth proportional to 128,735,557.20, 177,653,835.36 and 69,998,243.85 is: 96,596,905.77
Step by Step Solution
- Step 1: Write the proportion equation
128,735,557.20 : 177,653,835.36 = 69,998,243.85 : x - Step 2: Convert to fraction form
128,735,557.20/177,653,835.36 = 69,998,243.85/x - Step 3: Cross multiply
128,735,557.20x = 177,653,835.36 × 69,998,243.85 - Step 4: Simplify right side
128,735,557.20x = 12,435,456,488,417,032 - Step 5: Solve for x
x = 12,435,456,488,417,032/128,735,557.20 - Step 6: Final answer
x = 96,596,905.77
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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.