Finding the Fourth Proportional to 77,721,815.97, 107,256,625.65 and 42,439,866.21
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Solution
The fourth proportional to 77,721,815.97, 107,256,625.65 and 42,439,866.21 is: 58,567,299.10
Step by Step Solution
- Step 1: Write the proportion equation
77,721,815.97 : 107,256,625.65 = 42,439,866.21 : x - Step 2: Convert to fraction form
77,721,815.97/107,256,625.65 = 42,439,866.21/x - Step 3: Cross multiply
77,721,815.97x = 107,256,625.65 × 42,439,866.21 - Step 4: Simplify right side
77,721,815.97x = 4,551,956,842,722,055 - Step 5: Solve for x
x = 4,551,956,842,722,055/77,721,815.97 - Step 6: Final answer
x = 58,567,299.10
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1.5x scale
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.