Finding the Fourth Proportional to 253,403,990.12, 349,697,506.44 and 137,510,486.12
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Solution
The fourth proportional to 253,403,990.12, 349,697,506.44 and 137,510,486.12 is: 189,764,470.89
Step by Step Solution
- Step 1: Write the proportion equation
253,403,990.12 : 349,697,506.44 = 137,510,486.12 : x - Step 2: Convert to fraction form
253,403,990.12/349,697,506.44 = 137,510,486.12/x - Step 3: Cross multiply
253,403,990.12x = 349,697,506.44 × 137,510,486.12 - Step 4: Simplify right side
253,403,990.12x = 48,087,074,105,516,232 - Step 5: Solve for x
x = 48,087,074,105,516,232/253,403,990.12 - Step 6: Final answer
x = 189,764,470.89
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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.