Finding the Fourth Proportional to 77,720,991.50, 107,255,486.80 and 42,439,041.60
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Solution
The fourth proportional to 77,720,991.50, 107,255,486.80 and 42,439,041.60 is: 58,566,160.55
Step by Step Solution
- Step 1: Write the proportion equation
77,720,991.50 : 107,255,486.80 = 42,439,041.60 : x - Step 2: Convert to fraction form
77,720,991.50/107,255,486.80 = 42,439,041.60/x - Step 3: Cross multiply
77,720,991.50x = 107,255,486.80 × 42,439,041.60 - Step 4: Simplify right side
77,720,991.50x = 4,551,820,066,133,451 - Step 5: Solve for x
x = 4,551,820,066,133,451/77,720,991.50 - Step 6: Final answer
x = 58,566,160.55
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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.