Finding the Fourth Proportional to 77,182,885.20, 115,774,327.80 and 38,919,133.20
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Solution
The fourth proportional to 77,182,885.20, 115,774,327.80 and 38,919,133.20 is: 58,378,699.80
Step by Step Solution
- Step 1: Write the proportion equation
77,182,885.20 : 115,774,327.80 = 38,919,133.20 : x - Step 2: Convert to fraction form
77,182,885.20/115,774,327.80 = 38,919,133.20/x - Step 3: Cross multiply
77,182,885.20x = 115,774,327.80 × 38,919,133.20 - Step 4: Simplify right side
77,182,885.20x = 4,505,836,484,788,663 - Step 5: Solve for x
x = 4,505,836,484,788,663/77,182,885.20 - Step 6: Final answer
x = 58,378,699.80
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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.