Finding the Fourth Proportional to 212,869,416.80, 319,304,125.20 and 91,700,868.80
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Solution
The fourth proportional to 212,869,416.80, 319,304,125.20 and 91,700,868.80 is: 137,551,303.20
Step by Step Solution
- Step 1: Write the proportion equation
212,869,416.80 : 319,304,125.20 = 91,700,868.80 : x - Step 2: Convert to fraction form
212,869,416.80/319,304,125.20 = 91,700,868.80/x - Step 3: Cross multiply
212,869,416.80x = 319,304,125.20 × 91,700,868.80 - Step 4: Simplify right side
212,869,416.80x = 29,280,465,692,263,972 - Step 5: Solve for x
x = 29,280,465,692,263,972/212,869,416.80 - Step 6: Final answer
x = 137,551,303.20
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.