Finding the Fourth Proportional to 77,668,623.05, 107,184,972.16 and 42,388,690.97
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Solution
The fourth proportional to 77,668,623.05, 107,184,972.16 and 42,388,690.97 is: 58,497,633.71
Step by Step Solution
- Step 1: Write the proportion equation
77,668,623.05 : 107,184,972.16 = 42,388,690.97 : x - Step 2: Convert to fraction form
77,668,623.05/107,184,972.16 = 42,388,690.97/x - Step 3: Cross multiply
77,668,623.05x = 107,184,972.16 × 42,388,690.97 - Step 4: Simplify right side
77,668,623.05x = 4,543,430,661,839,241 - Step 5: Solve for x
x = 4,543,430,661,839,241/77,668,623.05 - Step 6: Final answer
x = 58,497,633.71
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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.