Finding the Fourth Proportional to 128,036,955.90, 176,690,985.99 and 69,299,610.72
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Solution
The fourth proportional to 128,036,955.90, 176,690,985.99 and 69,299,610.72 is: 95,633,455.68
Step by Step Solution
- Step 1: Write the proportion equation
128,036,955.90 : 176,690,985.99 = 69,299,610.72 : x - Step 2: Convert to fraction form
128,036,955.90/176,690,985.99 = 69,299,610.72/x - Step 3: Cross multiply
128,036,955.90x = 176,690,985.99 × 69,299,610.72 - Step 4: Simplify right side
128,036,955.90x = 12,244,616,546,839,974 - Step 5: Solve for x
x = 12,244,616,546,839,974/128,036,955.90 - Step 6: Final answer
x = 95,633,455.68
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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.