Finding the Fourth Proportional to 90,667,490.80, 136,001,236.20 and 82,731,305.20
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Solution
The fourth proportional to 90,667,490.80, 136,001,236.20 and 82,731,305.20 is: 124,096,957.80
Step by Step Solution
- Step 1: Write the proportion equation
90,667,490.80 : 136,001,236.20 = 82,731,305.20 : x - Step 2: Convert to fraction form
90,667,490.80/136,001,236.20 = 82,731,305.20/x - Step 3: Cross multiply
90,667,490.80x = 136,001,236.20 × 82,731,305.20 - Step 4: Simplify right side
90,667,490.80x = 11,251,559,779,639,488 - Step 5: Solve for x
x = 11,251,559,779,639,488/90,667,490.80 - Step 6: Final answer
x = 124,096,957.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.