Finding the Fourth Proportional to 77,485,973.53, 106,930,639.68 and 42,678,665.68
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Solution
The fourth proportional to 77,485,973.53, 106,930,639.68 and 42,678,665.68 is: 58,896,556.55
Step by Step Solution
- Step 1: Write the proportion equation
77,485,973.53 : 106,930,639.68 = 42,678,665.68 : x - Step 2: Convert to fraction form
77,485,973.53/106,930,639.68 = 42,678,665.68/x - Step 3: Cross multiply
77,485,973.53x = 106,930,639.68 × 42,678,665.68 - Step 4: Simplify right side
77,485,973.53x = 4,563,657,022,045,001 - Step 5: Solve for x
x = 4,563,657,022,045,001/77,485,973.53 - Step 6: Final answer
x = 58,896,556.55
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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.